The Journal of Heredity 2001:92(4)
© 2001 The American Genetic Association 92:371-373
Computer Note |
DAMBE: Software Package for Data Analysis in Molecular Biology and Evolution
From the Bioinformatics Laboratory, Department of Ecology and Biodiversity, University of Hong Kong, Pokfulam Road, Hong Kong.
Address correspondence to Xuhua Xia at the address above or e-mail: xxia{at}hkusua.hku.hk.
| Abstract |
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DAMBE (data analysis in molecular biology and evolution) is an integrated software package for converting, manipulating, statistically and graphically describing, and analyzing molecular sequence data with a user-friendly Windows 95/98/2000/NT interface. DAMBE is free and can be downloaded from http://web.hku.hk/~xxia/software/software.htm. The current version is 4.0.36.
| Introduction |
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DAMBE (data analysis in molecular biology and evolution) is an integrated computer program for descriptive and comparative analysis of molecular data (including nucleotide and amino acid sequence data, as well as allele frequency and distance matrix data). It has features either not available or poorly implemented in other programs. These features are grouped into (1) sequence format conversion and manipulation supporting 20 commonly used molecular data formats; (2) descriptive statistics such as nucleotide, amino acid, and codon frequencies, dinucleotide and diamino acid frequencies, analysis of codon usage and amino acid usage bias; and (3) comparative sequence analysis such as phylogenetic reconstruction of trees and ancestral sequences with distance, maximum parsimony and maximum-likelihood methods, bootstrapping and jackknifing, significance tests of molecular clock and alternative phylogenetic hypotheses (i.e., how much better is the best tree compared to alternative trees), fitting statistical distributions to substitution data over sites including Poisson, negative binomial, and gamma distributions. DAMBE features a user-friendly Windows interface with extensive on-line help.
| Sequence Input and Sequence Format Conversion |
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DAMBE can read and convert almost all commonly used molecular data formats (Table 1). In particular, DAMBE can take advantage of the rich information contained in the FEATURES table of GenBank files and extract specific segments such as CDS, exons, introns, rRNA, etc., by a few mouse clicks. The user can also use "custom splicing" to extract sequence segments that are not specified in the GenBank sequences.
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DAMBE can read sequence files directly from a networked computer, such as a remote UNIX workstation, in the same way as one would read a file from a local hard disk. Extensive network functions have also been implemented for retrieving sequences directly from GenBank, either by LOCUS name or accession number, or by keyword search.
DAMBE features a color-coded sequence editor for either sequence input or visual alignment. Sequences can be as long as 32,768 bp.
| Sequence Manipulation |
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We will only highlight two of the many sequence manipulation features in DAMBE.
Sequence Alignment
DAMBE can align nucleotide and amino acid sequences as most other alignment programs do. However, one particular feature that is not available in most other alignment programs is the ability to align protein-coding nucleotide sequences against aligned amino acid sequences. Other programs often introduce frame-shift indels in the aligned protein-coding sequences, even if the protein genes are known to be functional and do not have these frame-shifting indels. In other words, the introduced frame-shifting indels in the aligned sequences are alignment artifacts, and the correctly aligned sequences should have complete codons, not one or two nucleotides, inserted or deleted.
DAMBE solves this problem by aligning the protein-coding nucleotide sequences against aligned amino acid sequences. One can read in the protein-coding nucleotide sequences, translate them into amino acid sequences, align the amino acid sequences, and then align the original nucleotide sequences against the aligned amino acid sequences.
Translation
DAMBE implements all 12 different genetic codes and can therefore translate protein-coding nucleotide sequences from any organism to amino acid sequences. The implementation of these genetic codes greatly facilitates amino acid-based and codon-based analyses.
| Descriptive Sequence Analysis |
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This includes nucleotide, amino acid and codon usage analysis, compositional analysis based on dinucleotide and diamino acid frequencies, quantification of the effect of GC and TpA frequencies on exon and CDS lengths, and the methylation effect on codon usage bias.
A substitution model used in comparative sequence analysis, such as phylogenetic reconstruction using the maximum-likelihood method, typically has two categories of parameters, the frequency parameters and the rate ratio parameters. The descriptive sequence analysis helps to understand the factors affecting the frequency parameters and to select which substitution model to use in phylogenetic reconstruction.
| Comparative Sequence Analysis |
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Quantification of Substitution Patterns
A substitution model is characterized by frequency parameters and rate ratio parameters, and it is important to know the empirical substitution patterns in order to decide which substitution model to use in analyzing sequences. The quantification of empirical substitution patterns requires pairwise comparisons. However, when the comparison is done between all possible sequence pairs, the resulting substitution pattern may be biased because the comparisons are not independent (Felsenstein 1992; Nee et al. 1996; Xia et al. 1996). For example, if there is one species that has recently experienced a large number of A
G transitions and few other substitutions, then all pairwise comparisons between this species and the other species will each contribute one data point with a large A
G transition bias. One way to avoid such a problem of nonindependence is to reconstruct ancestral states of DNA sequences and estimate the number of substitutions between neighboring nodes along the phylogenetic tree (Tamura and Nei 1993; Xia 1998; Xia and Li 1998). DAMBE automates this process.
Phylogenetic Reconstruction
DAMBE implements most commonly used phylogenetic methods such as distance-based (UPGMA, Fitch-Margoliash, and neighbor-joining methods), maximum parsimony, and maximum-likelihood methods. A variety of genetic distances are implemented. Nucleotide-based distances include the one-parameter (Jukes and Cantor 1969) and two-parameter (Kimura 1980) distances, the paralinear distance (Lake 1994), as well as distances based on the F84 model (Felsenstein 1993) and TN93 model (Tamura and Nei 1993). Codon-based distances include Li's (1993) synonymous and nonsynonymous distances. The UPGMA and neighbor-joining methods can handle tied values in the matrix and generate all possible alternative trees. Most other distance-based programs output only one of the possible trees.
All phylogenetic analyses for protein-coding genes can be performed on individual codon positions or combinations of codon positions, for example, the first and second codon positions when the third codon position experienced substitution saturation. Alternatively, one can also perform analysis on translated amino acid sequences. DAMBE can translate nucleotide sequences from any organism into amino acid sequences because it implements all known genetic codes.
Phylogenetic Analysis Involving Bootstrapping and Jackknifing
Bootstrapping and delete-half jackknifing are implemented in DAMBE in conjunction with the phylogenetic methods mentioned above. Resampling can be nucleotide based, amino acid based, or codon based. The last is necessary for doing bootstrapping and jackknifing with codon-based methods such as Li's (1993) synonymous and nonsynonymous distances. Consensus trees are displayed with bootstrapping values at internal nodes. The branch lengths of a consensus tree can be evaluated.
Testing Alternative Phylogenetic Hypotheses
It is often necessary to evaluate the relative statistical support for alternative phylogenetic hypotheses such as alternative phylogenetic trees. Such hypothesis tests can be carried out in DAMBE with the distance, maximum parsimony, or maximum-likelihood methods. The significance tests make proper multiple comparisons involving multiple trees.
For the distance methods, the test is similar to that detailed in Xia (2000), except that the following equation
![]() | (1) |
For the maximum parsimony method, a rooted tree is required to represent alternative topologies. DNAPARS in PHYLIP has already provided a significance test if you include user trees in the input file. In short, DNAPARS computes the number of steps (changes in character states) for each topology, the difference in the number of steps between the best and each alternative topology, and the associated (large sample) variance of the differences. The z score is computed and declared as significant if it is larger than 1.96 (Felsenstein 1985). The main problem with this test is that the result can be interpreted probabilistically only when you have just two topologies and is not appropriate with multiple comparisons. DAMBE takes the same approach but uses the NewmanKeuls test that is better for multiple comparisons.
For the maximum-likelihood method, the KishinoHasegawa test (Kishino and Hasegawa 1989), which is also called the RELL test, is implemented as in PAML (Yang 2000) from which I have taken part of the code. The KishinoHasegawa test, as is practiced in literature, is analogous to the test in DNAPARS mentioned above, except that the test is based on the likelihood values rather than on the number of steps. In short, one calculates the log-likelihood for each topology, the difference in log-likelihood between the best tree and each of the alternative topologies, and the variance of the differences estimated by resampling methods such as bootstrapping. The z score is then calculated and declared as significant if it is larger than 1.96. Again, such interpretation is heuristic and is not appropriate probabilistically if there are more than two topologies being compared. DAMBE does the same computation but uses the NewmanKeuls test which is more appropriate for multiple comparisons.
Phylogenetic Tree Viewing and Manipulation
DAMBE can graph and print publication-quality trees. The tree-displaying window is scrollable and therefore can accommodate very large trees. The displayed tree can also be copied to presentation programs such as Microsoft PowerPoint.
Fitting Statistical Distributions to Substitutions Over Sites
It is important to know if the substitution rates vary among sites, because such rate heterogeneity, according to a comparative study based on simulated data (Kuhner and Felsenstein 1994), results in failure to recover the true phylogenetic relationships in virtually all commonly used phylogenetic programs (or algorithms), including the maximum-likelihood method (e.g., PHYLIP), maximum parsimony (e.g., PAUP), or neighbor-joining (e.g., MEGA) methods. DAMBE can fit the Poisson, negative binomial, and gamma distributions to substitution data over sites. The maximum-likelihood estimator for k in the negative binomial distribution is from Johnson et al. (1992), and that for the shape parameter in the gamma distribution is from Evans et al. (1993).
| Graphics |
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In addition to graphically displaying and printing trees, DAMBE also produces a variety of graphic outputs including plotting one or more amino acid properties along amino acid sequences (e.g., polarity plot), saturation plots (i.e., transitions and transversions over divergence), variability-over-site plots, substitution-over-site plots, etc.
In short, DAMBE is a user-friendly program for the Windows platform that features a suite of unique features as well as the capability of performing most routine data analyses in molecular biology, ecology, and evolution.
| Acknowledgments |
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DAMBE has incorporated codes from PHYLIP with permission from J. Felsenstein, and from the BASEML program in PAML with permission from Z. Yang. Part of the codes for sequence alignment in DAMBE are taken from the program CLUSTAL by D. Higgins, J. Thompson, and T. Gibson. DAMBE development is supported by a CRCG grant from the University of Hong Kong (10203043/27662, 10203435/27662) and an RGC grant from Hong Kong Research Grant Council (HKU7265/00M; to X.X.). We thank W. H. Li for using DAMBE in his bioinformatics course and H. Kong for assistance.
| Footnotes |
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Corresponding Editor: Sudhir Kumar
Received July 30, 2000
Accepted February 14, 2001
| References |
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Felsenstein J, 1985. Confidence limits on phylogenies with a molecular clock. Syst Zool 34:152161.
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S. Calattini, S. A. Chevalier, R. Duprez, P. Afonso, A. Froment, A. Gessain, and R. Mahieux Human T-Cell Lymphotropic Virus Type 3: Complete Nucleotide Sequence and Characterization of the Human Tax3 Protein J. Virol., October 1, 2006; 80(19): 9876 - 9888. [Abstract] [Full Text] [PDF] |
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G. M. Attardo, I. A. Hansen, S.-H. Shiao, and A. S. Raikhel Identification of two cationic amino acid transporters required for nutritional signaling during mosquito reproduction J. Exp. Biol., August 15, 2006; 209(16): 3071 - 3078. [Abstract] [Full Text] [PDF] |
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P. Rico, P. Ivars, S. F. Elena, and C. Hernandez Insights into the selective pressures restricting pelargonium flower break virus genome variability: evidence for host adaptation. J. Virol., August 1, 2006; 80(16): 8124 - 8132. [Abstract] [Full Text] [PDF] |
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X. Xia, H. Wang, Z. Xie, M. Carullo, H. Huang, and D. Hickey Cytosine Usage Modulates the Correlation between CDS Length and CG Content in Prokaryotic Genomes Mol. Biol. Evol., July 1, 2006; 23(7): 1450 - 1454. [Abstract] [Full Text] [PDF] |
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F. M. Codoner, M. A. Fares, and S. F. Elena Adaptive Covariation between the Coat and Movement Proteins of Prunus Necrotic Ringspot Virus. J. Virol., June 1, 2006; 80(12): 5833 - 5840. [Abstract] [Full Text] [PDF] |
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C. E. Popescu, T. Borza, J. P. Bielawski, and R. W. Lee Evolutionary Rates and Expression Level in Chlamydomonas Genetics, March 1, 2006; 172(3): 1567 - 1576. [Abstract] [Full Text] [PDF] |
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T. D. Bunch, C. Wu, Y.-P. Zhang, and S. Wang Phylogenetic Analysis of Snow Sheep (Ovis nivicola) and Closely Related Taxa J. Hered., January 1, 2006; 97(1): 21 - 30. [Abstract] [Full Text] [PDF] |
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E. T. Steenkamp, J. Wright, and S. L. Baldauf The Protistan Origins of Animals and Fungi Mol. Biol. Evol., January 1, 2006; 23(1): 93 - 106. [Abstract] [Full Text] [PDF] |
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K.-F. Chung, C.-I Peng, S. R. Downie, K. Spalik, and B. A. Schaal Molecular systematics of the trans-Pacific alpine genus Oreomyrrhis (Apiaceae): phylogenetic affinities and biogeographic implications Am. J. Botany, December 1, 2005; 92(12): 2054 - 2071. [Abstract] [Full Text] [PDF] |
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T. Huyse and F. A. M. Volckaert Comparing Host and Parasite Phylogenies: Gyrodactylus Flatworms Jumping from Goby to Goby Syst Biol, October 1, 2005; 54(5): 710 - 718. [Abstract] [Full Text] [PDF] |
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Y.-L. Guo and S. Ge Molecular phylogeny of Oryzeae (Poaceae) based on DNA sequences from chloroplast, mitochondrial, and nuclear genomes Am. J. Botany, September 1, 2005; 92(9): 1548 - 1558. [Abstract] [Full Text] [PDF] |
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E. Albertini, G. Marconi, L. Reale, G. Barcaccia, A. Porceddu, F. Ferranti, and M. Falcinelli SERK and APOSTART. Candidate Genes for Apomixis in Poa pratensis Plant Physiology, August 1, 2005; 138(4): 2185 - 2199. [Abstract] [Full Text] [PDF] |
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K. T. Zlateva, P. Lemey, E. Moes, A.-M. Vandamme, and M. Van Ranst Genetic Variability and Molecular Evolution of the Human Respiratory Syncytial Virus Subgroup B Attachment G Protein J. Virol., July 15, 2005; 79(14): 9157 - 9167. [Abstract] [Full Text] [PDF] |
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S. Van Dooren, L. Meertens, P. Lemey, A. Gessain, and A.-M. Vandamme Full-genome analysis of a highly divergent simian T-cell lymphotropic virus type 1 strain in Macaca arctoides J. Gen. Virol., July 1, 2005; 86(7): 1953 - 1959. [Abstract] [Full Text] [PDF] |
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A. Rector, K. Van Doorslaer, M. Bertelsen, I. K. Barker, R.-A. Olberg, P. Lemey, J. P. Sundberg, and M. Van Ranst Isolation and cloning of the raccoon (Procyon lotor) papillomavirus type 1 by using degenerate papillomavirus-specific primers J. Gen. Virol., July 1, 2005; 86(7): 2029 - 2033. [Abstract] [Full Text] [PDF] |
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B. Klempa, M. Stanko, M. Labuda, R. Ulrich, H. Meisel, and D. H. Kruger Central European Dobrava Hantavirus Isolate from a Striped Field Mouse (Apodemus agrarius) J. Clin. Microbiol., June 1, 2005; 43(6): 2756 - 2763. [Abstract] [Full Text] [PDF] |
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E.-M. Prinzenberg, K. Gutscher, S. Chessa, A. Caroli, and G. Erhardt Caprine {kappa}-Casein (CSN3) Polymorphism: New Developments in Molecular Knowledge J Dairy Sci, April 1, 2005; 88(4): 1490 - 1498. [Abstract] [Full Text] [PDF] |
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C.-W. Luo, M. D. Pisarska, and A. J. W. Hsueh Identification of a Stanniocalcin Paralog, Stanniocalcin-2, in Fish and the Paracrine Actions of Stanniocalcin-2 in the Mammalian Ovary Endocrinology, January 1, 2005; 146(1): 469 - 476. [Abstract] [Full Text] [PDF] |
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A. Rector, G. D. Bossart, S.-J. Ghim, J. P. Sundberg, A. B. Jenson, and M. Van Ranst Characterization of a Novel Close-to-Root Papillomavirus from a Florida Manatee by Using Multiply Primed Rolling-Circle Amplification: Trichechus manatus latirostris Papillomavirus Type 1 J. Virol., November 15, 2004; 78(22): 12698 - 12702. [Abstract] [Full Text] [PDF] |
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J. P. Bielawski, K. A. Dunn, G. Sabehi, and O. Beja Darwinian adaptation of proteorhodopsin to different light intensities in the marine environment PNAS, October 12, 2004; 101(41): 14824 - 14829. [Abstract] [Full Text] [PDF] |
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G. M. Kovacs, A. J. Davison, A. N. Zakhartchouk, and B. Harrach Analysis of the first complete genome sequence of an Old World monkey adenovirus reveals a lineage distinct from the six human adenovirus species J. Gen. Virol., October 1, 2004; 85(10): 2799 - 2807. [Abstract] [Full Text] [PDF] |
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S. A. A. Travers, J. P. Clewley, J. R. Glynn, P. E. M. Fine, A. C. Crampin, F. Sibande, D. Mulawa, J. O. McInerney, and G. P. McCormack Timing and Reconstruction of the Most Recent Common Ancestor of the Subtype C Clade of Human Immunodeficiency Virus Type 1 J. Virol., October 1, 2004; 78(19): 10501 - 10506. [Abstract] [Full Text] [PDF] |
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K. Banyai, V. Martella, F. Jakab, B. Melegh, and G. Szucs Sequencing and Phylogenetic Analysis of Human Genotype P[6] Rotavirus Strains Detected in Hungary Provides Evidence for Genetic Heterogeneity within the P[6] VP4 Gene J. Clin. Microbiol., September 1, 2004; 42(9): 4338 - 4343. [Abstract] [Full Text] [PDF] |
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Z. Tan, Y. Wada, J. Chen, and K. Ohshima Inter- and intralineage recombinants are common in natural populations of Turnip mosaic virus J. Gen. Virol., September 1, 2004; 85(9): 2683 - 2696. [Abstract] [Full Text] [PDF] |
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F. Chimienti, S. Devergnas, A. Favier, and M. Seve Identification and Cloning of a {beta}-Cell-Specific Zinc Transporter, ZnT-8, Localized Into Insulin Secretory Granules Diabetes, September 1, 2004; 53(9): 2330 - 2337. [Abstract] [Full Text] [PDF] |
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Y. Nishio, Y. Nakamura, Y. Usuda, S. Sugimoto, K. Matsui, Y. Kawarabayasi, H. Kikuchi, T. Gojobori, and K. Ikeo Evolutionary Process of Amino Acid Biosynthesis in Corynebacterium at the Whole Genome Level Mol. Biol. Evol., September 1, 2004; 21(9): 1683 - 1691. [Abstract] [Full Text] [PDF] |
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K. Banyai, J. R. Gentsch, R. Schipp, F. Jakab, J. Bene, B. Melegh, R. I. Glass, and G. Szucs Molecular epidemiology of human P[8],G9 rotaviruses in Hungary between 1998 and 2001 J. Med. Microbiol., August 1, 2004; 53(8): 791 - 801. [Abstract] [Full Text] [PDF] |
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B. Moury Differential Selection of Genes of Cucumber Mosaic Virus Subgroups Mol. Biol. Evol., August 1, 2004; 21(8): 1602 - 1611. [Abstract] [Full Text] [PDF] |
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T. de Oliveira, M. Salemi, M. Gordon, A.-M. Vandamme, E. J. van Rensburg, S. Engelbrecht, H. M. Coovadia, and S. Cassol Mapping Sites of Positive Selection and Amino Acid Diversification in the HIV Genome: An Alternative Approach to Vaccine Design? Genetics, July 1, 2004; 167(3): 1047 - 1058. [Abstract] [Full Text] [PDF] |
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X. Wang and J. Zhang Rapid Evolution of Mammalian X-Linked Testis-Expressed Homeobox Genes Genetics, June 1, 2004; 167(2): 879 - 888. [Abstract] [Full Text] [PDF] |
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K. Hanada, Y. Suzuki, and T. Gojobori A Large Variation in the Rates of Synonymous Substitution for RNA Viruses and Its Relationship to a Diversity of Viral Infection and Transmission Modes Mol. Biol. Evol., June 1, 2004; 21(6): 1074 - 1080. [Abstract] [Full Text] [PDF] |
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K. T. Zlateva, P. Lemey, A.-M. Vandamme, and M. Van Ranst Molecular Evolution and Circulation Patterns of Human Respiratory Syncytial Virus Subgroup A: Positively Selected Sites in the Attachment G Glycoprotein J. Virol., May 1, 2004; 78(9): 4675 - 4683. [Abstract] [Full Text] [PDF] |
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A. Fiebig, R. Kimport, and D. Preuss Comparisons of pollen coat genes across Brassicaceae species reveal rapid evolution by repeat expansion and diversification PNAS, March 2, 2004; 101(9): 3286 - 3291. [Abstract] [Full Text] [PDF] |
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N. R. Chowdhury, O. C. Stine, J. G. Morris, and G. B. Nair Assessment of Evolution of Pandemic Vibrio parahaemolyticus by Multilocus Sequence Typing J. Clin. Microbiol., March 1, 2004; 42(3): 1280 - 1282. [Abstract] [Full Text] [PDF] |
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B. Klempa, M. Schutt, B. Auste, M. Labuda, R. Ulrich, H. Meisel, and D. H. Kruger First Molecular Identification of Human Dobrava Virus Infection in Central Europe J. Clin. Microbiol., March 1, 2004; 42(3): 1322 - 1325. [Abstract] [Full Text] [PDF] |
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N. Yu, M. I. Jensen-Seaman, L. Chemnick, O. Ryder, and W.-H. Li Nucleotide Diversity in Gorillas Genetics, March 1, 2004; 166(3): 1375 - 1383. [Abstract] [Full Text] [PDF] |
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S. Van Dooren, V. Shanmugam, V. Bhullar, B. Parekh, A.-M. Vandamme, W. Heneine, and W. M. Switzer Identification in gelada baboons (Theropithecus gelada) of a distinct simian T-cell lymphotropic virus type 3 with a broad range of Western blot reactivity J. Gen. Virol., February 1, 2004; 85(2): 507 - 519. [Abstract] [Full Text] [PDF] |
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P. J. Esteves, D. Lanning, N. Ferrand, K. L. Knight, S.-K. Zhai, and W. van der Loo Allelic Variation at the VHa Locus in Natural Populations of Rabbit (Oryctolagus cuniculus, L.) J. Immunol., January 15, 2004; 172(2): 1044 - 1053. [Abstract] [Full Text] [PDF] |
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V. Courgnaud, B. Abela, X. Pourrut, E. Mpoudi-Ngole, S. Loul, E. Delaporte, and M. Peeters Identification of a New Simian Immunodeficiency Virus Lineage with a vpu Gene Present among Different Cercopithecus Monkeys (C. mona, C. cephus, and C. nictitans) from Cameroon J. Virol., December 1, 2003; 77(23): 12523 - 12534. [Abstract] [Full Text] [PDF] |
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R. R. Tonjes and M. Niebert Relative Age of Proviral Porcine Endogenous Retrovirus Sequences in Sus scrofa Based on the Molecular Clock Hypothesis J. Virol., November 15, 2003; 77(22): 12363 - 12368. [Abstract] [Full Text] [PDF] |
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N. Yu, M. I. Jensen-Seaman, L. Chemnick, J. R. Kidd, A. S. Deinard, O. Ryder, K. K. Kidd, and W.-H. Li Low Nucleotide Diversity in Chimpanzees and Bonobos Genetics, August 1, 2003; 164(4): 1511 - 1518. [Abstract] [Full Text] [PDF] |
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A. M. Lindberg, P. Andersson, C. Savolainen, M. N. Mulders, and T. Hovi Evolution of the genome of Human enterovirus B: incongruence between phylogenies of the VP1 and 3CD regions indicates frequent recombination within the species J. Gen. Virol., May 1, 2003; 84(5): 1223 - 1235. [Abstract] [Full Text] [PDF] |
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A. Steinrigl and D. Klein Phylogenetic analysis of feline immunodeficiency virus in Central Europe: a prerequisite for vaccination and molecular diagnostics J. Gen. Virol., May 1, 2003; 84(5): 1301 - 1307. [Abstract] [Full Text] [PDF] |
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A. Gandolfi, I. R. Sanders, V. Rossi, and P. Menozzi Evidence of Recombination in Putative Ancient Asexuals Mol. Biol. Evol., May 1, 2003; 20(5): 754 - 761. [Abstract] [Full Text] [PDF] |
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A. Navarro and N. H. Barton Chromosomal Speciation and Molecular Divergence--Accelerated Evolution in Rearranged Chromosomes Science, April 11, 2003; 300(5617): 321 - 324. [Abstract] [Full Text] [PDF] |
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J Cocquet, E Pailhoux, F Jaubert, N Servel, X Xia, M Pannetier, E De Baere, L Messiaen, C Cotinot, M Fellous, et al. Evolution and expression of FOXL2 J. Med. Genet., December 1, 2002; 39(12): 916 - 921. [Full Text] [PDF] |
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S. Yi, D. L. Ellsworth, and W.-H. Li Slow Molecular Clocks in Old World Monkeys, Apes, and Humans Mol. Biol. Evol., December 1, 2002; 19(12): 2191 - 2198. [Abstract] [Full Text] [PDF] |
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J. A. Harton, M. W. Linhoff, J. Zhang, and J. P.-Y. Ting Cutting Edge: CATERPILLER: A Large Family of Mammalian Genes Containing CARD, Pyrin, Nucleotide-Binding, and Leucine-Rich Repeat Domains J. Immunol., October 15, 2002; 169(8): 4088 - 4093. [Abstract] [Full Text] [PDF] |
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B. Moury, C. Morel, E. Johansen, and M. Jacquemond Evidence for diversifying selection in Potato virus Y and in the coat protein of other potyviruses J. Gen. Virol., October 1, 2002; 83(10): 2563 - 2573. [Abstract] [Full Text] [PDF] |
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