title: Positive selection and the molecular evolution of a gene of male reproduction, Acp26Aa of Drosophila.
abstract: The gene for a male ejaculatory protein, Acp26Aa, in four sibling species of the Drosophila melanogaster subgroup has previously been shown to have a nonsynonymous rate (Ka) of nucleotide substitution that is indistinguishable from the synonymous rate (Ks). By examining this gene in two other species of this subgroup, we found that Ka is generally large and can sometimes be more than twice as large as Ks. This suggests that positive selection may be operating at this locus of male reproduction.
authors.affiliation: Department of Ecology and Evolution, University of Chicago, IIIinois 60637, USA.
authors.forename: S C
authors.initials: SC
authors.lastname: Tsaur
authors.forename: C I
authors.initials: CI
authors.lastname: Wu
mesh_terms: D000818:Animals; D001483:Base Sequence; D004247:DNA / Q000235:genetics; D004330:Drosophila / Q000145:classification / Q000235:genetics*; D029721:Drosophila Proteins; D004331:Drosophila melanogaster / Q000235:genetics; D019143:Evolution, Molecular; D017344:Genes, Insect; D019476:Insect Proteins / Q000235:genetics; D036341:Intercellular Signaling Peptides and Proteins; D008297:Male; D008969:Molecular Sequence Data; D010455:Peptides / Q000235:genetics; D010802:Phylogeny; D012098:Reproduction / Q000235:genetics; D012641:Selection, Genetic; D013045:Species Specificity
chemical_list: D004247:DNA; D029721:Drosophila Proteins; D019476:Insect Proteins; D036341:Intercellular Signaling Peptides and Proteins; D010455:Peptides; C489171:Acp26Aa protein, Drosophila; C489177:Acp36DE protein, Drosophila; C056736:SP protein, Drosophila