Leipoldt M, Eckhardt R, Schmid M. Comparative DNA/DNA reassociation kinetics in three hamster species.
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. B, COMPARATIVE BIOCHEMISTRY 1982;
72:385-91. [PMID:
7128102 DOI:
10.1016/0305-0491(82)90216-4]
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Abstract
1. Three major DNA repetition classes can be distinguished in the genomes of three hamster species Mesocricetus auratus, Cricetulus griseus, and Phodopus sungorus sungorus: A very fast reassociating fraction of about 13% of the DNA, a fast reassociating fraction comprising 10-23% of the DNA, and a slowly reassociating fraction containing single-copy sequences of 63-78% of hamster DNA. 2. In the DNA of the Syrian and Djungarian hamster 43%-53%, and in the DNA of the Chinese hamster 80% of the single-copy sequences are interspersed with repetitive sequences. 3. The lengths of repetitive DNA sequences, vary between more than 3 kb and 0.3 kb, with the majority of sequences having a length of 0.3 kb to 0.5 kb. 4. The findings suggest that the genomes of the hamster species studied are organized in a short period interspersion pattern. 5. Unlike other vertebrate and invertebrate genomes, moderately repetitive sequences exhibit a high degree of intraspecific homology in the hamster genome.
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