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The Journal of Heredity 1978:69(5):282-284
© 1978 The American Genetic Association 69:282-284

research-article

Chromatographic comparisons of heterotic rat liver histones

GARY TALLMAN, WALTER KACZMARCZYK, and VALENTIN ULRICH

Dr. Tallman is currently a research associate in the Department of Biochemistry, Kansas State University, Manhattan, Kansas 66506.
Dr. Ulrich and Dr. Kaczmarczyk are associated with the Plant Science Division, West Virginia University, Morgantown, West Virginia 26506

Reprint requests should be addressed to Dr. Ulrich

Abstract

Chromatographic comparisons of histones isolated by acid extraction of liver chromatin preparations from F344 inbred rats and their paternal heterotic F344 × H hybrid progeny reveal the presence of a number of age-and line-specific nonhistones also extractable in acid. The patterns of the core histones (H2A, H2B, H3, and H4) remain relatively constant during development, while histone HI shows unusual chromatographic properties in the 30- and 35-day hybrid preparations. In general, the complexity of the nonhistone fraction decreases as the animal ages.

Such variations may be a reflection of a prelude to altered genetic activity in organisms undergoing growth and development at different rates, and may have significant implications for transcriptional processes.


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