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The Journal of Heredity 1982:73(3):231-233
© 1982 The American Genetic Association 73:231-233

other

The constitutive heterochromatin of porcine chromosomes

C. C. Lin, E. Joyce, B. M. Biederman, and S. Gerhart

Departments of Pediatrics and Medical Biochemistry, Faculty of Medicine. the University of Calgary Calgary, Alberta, Canada T2N 1 N4

Abstract

The constitutive heterochromatin of porcine chromosomes was cytologically resolved into four types by using a combination of both C-banding techniques and base specific DNA binding fluorochromes. The four types of constitutive heterochromatin are: 1) C-band positive, A-T rich hetarochromatin located in the cantromeric region of acrocantric chromosomes; 2) faint C-band positive, G-C rich heterochromatin located mainly in the centromeric region of blarm, chromosomes; 3) C-band positive heterochromatin located in the long arm of the Y chromosome lacking available binding sites for either A-T or G-C specific fluorochromes; and 4) C-banding negative centromatin heterochromatin of the Y chromosomes lacking available binding sites for either A-T or G-C specific fluorochromes.


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