Comparative DNA renaturation kinetics in amphibians.

Proceedings of the National Academy of Sciences of the United States of America ·Vol. 68 ·No. 4 ·1971-04-00 ·Pages 799-802

Straus NA

Abstract

Amphibian haploid genome sizes vary from 9 x 10(8) to 8 x 10(10) nucleotide pairs. The rate of reassociation of DNA from amphibians of different genome sizes has been employed to eliminate one of the theoretical models of chromosome structure. Scaphiopus couchi, Bufo marinus, and Rana clamitans, whose haploid genome sizes are in the ratio 2:7:10, all contain sequences of DNA represented once in the haploid genome. This indicates that their chromosomes are not composed of identical lateral strands (polynemy). The relative frequencies of repetition of DNA sequences are different for the various species of amphibians. The observed frequencies of repetitive DNA sequences in amphibians do not show the relationships expected if amphibians form a polyneme series.

MeSH Terms

Amphibians Animals Anura Chemical Phenomena Chemistry Chromosomes Cytogenetics DNA Genetic Code In Vitro Techniques Kinetics Models, Structural Nucleotides Species Specificity Urodela

Chemicals

Nucleotides DNA

Authors & Affiliations

1 authors, click to expand affiliations / ORCID

Straus N A

References (17)

17 references, click to expand

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Article Info

Journal

Proceedings of the National Academy of Sciences of the United States of America

Abbr.

Proc Natl Acad Sci U S A

ISSN

0027-8424

DOI

10.1073/pnas.68.4.799

Published

1971-04-00

Pages

799-802

Language

English

Region

United States

NLM ID

7505876

PMCID

PMC389046

Subset

External Links

PubMed source DOI: 10.1073/pnas.68.4.799 PMC Full Text View journal details

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