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. 1972 Aug 11;177(4048):530-2.
doi: 10.1126/science.177.4048.530.

Evolutionary clock: nonconstancy of rate in different species

T H Jukes, R Holmquist

Evolutionary clock: nonconstancy of rate in different species

T H Jukes et al. Science. .

Abstract

By using various methods for comparing polypeptide sequences we find that the evolutionary divergence of rattlesnake cytochrome c from cytochromes c of species in other classes has been more rapid than that of cytochrome c of another reptile, the snapping turtle. This suggests that the evolutionary rate of change of cytochromes c is species-dependent as well as time-dependent.

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