protein clock hypothesis

'protein clock hypothesis' can also refer to...


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The postulation that amino acid substitutions occur at a constant rate for a given family of proteins (e.g., cytochromes, hemoglobins) and hence that the degree of divergence between two species in the amino acid sequences of the protein in question can be used to estimate the length of time that has elapsed since their divergence from a common ancestor.

Subjects: Genetics and Genomics.

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