@article {309721,
	title = {Evidence for convergent evolution of A and B blood group antigens in primates.},
	journal = {Hum Genet},
	volume = {101},
	year = {1997},
	month = {1997 Dec},
	pages = {141-8},
	abstract = {<p>To determine whether convergent or trans-specific evolution is responsible for the persistence of the ABO polymorphism in apes, we have sequenced segments of introns 5 and 6 of the ABO gene. Four substitutions and one insertion or deletion group human A, B, and O alleles together, separate from their chimpanzee A and gorilla B counterparts. No shared substitutions support a trans-species mode of evolution for any of the alleles examined. We conclude that the A and B antigens of the chimpanzee and gorilla, respectively, have arisen by convergent evolution. Phylogenetic analysis suggests that the human A and B alleles are ancient, having diverged at least 3 million years ago. These alleles must have therefore been trans-specifically inherited within the genus Homo.</p>
},
	keywords = {ABO Blood-Group System, Animals, Base Sequence, Evolution, Molecular, Gorilla gorilla, Hominidae, Humans, Molecular Sequence Data, Pan troglodytes, Phylogeny, Polymerase Chain Reaction, Primates, Sequence Analysis, DNA, Sequence Homology, Nucleic Acid},
	issn = {0340-6717},
	author = {O{\textquoteright}hUigin, C and Sato, A and Klein, J}
}
