Averof, M Evidence for a high frequency of simultaneous double-nucleotide substitutions. [electronic resource] - Science (New York, N.Y.) Feb 2000 - 1283-6 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't ISSN: 0036-8075 Standard No.: 10.1126/science.287.5456.1283 doi Subjects--Topical Terms: AllelesAmino Acid SubstitutionAnimalsCodonEvolution, MolecularGlobins--geneticsHaplorhini--geneticsHumansModels, GeneticMutationNucleotides--geneticsPhylogenySerine--genetics