Evolution of Myoglobin Amino Acid Sequences in Primates and Other Vertebrates
We have previously (Romero-Herrera et al., 1973) sought to combine evidence from the myoglobin sequences of 18 mammals with a phylogenetic pattern based on zoological evidence. By minimizing the number of mutations, we constructed a cladogram showing the possible Molecular evolution of myoglobin and generated a hypothetical myoglobin chain for a mammalian common ancestor. We proposed that the term “average” rate is more appropriate than “constant” rate, in the context of Molecular evolution. Our phylogenetic pattern was based on the fossil record, and when the available evidence did not resolve the sequence of successive dichotomies the branching points were superimposed and shown as a trichotomy. The evidence from myoglobin resolved these trichotomies in a pattern that would be acceptable to comparative anatomists.
KeywordsCommon Ancestor Fossil Record Squirrel Monkey Common Ancestry Single Point Mutation
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