Fibrinopeptides A and B of Japanese monkey (Macaca fuscata) and patas monkey (Erythrocebus patas): their amino acid sequences, restricted mutations, and a molecular phylogeny for macaques, guenons, and baboons.

Amino acid sequences of fibrinopeptides A and B from the macaque, Macaca fuscata (Japanese monkey) and the guenon, Erythrocebus patas (patas monkey) were established. Fibrinopeptides A of the monkeys had a sequence identical with those of baboons: Ala-Asp-Thr-Gly-Glu-Gly-Asp-Phe-Leu-Ala-Glu-Gly-Gly-Gly-Val-Arg. Fibrinopeptides B were 9-residue, "short," peptides with the sequences Asn-Glu-Glu-Ser-Leu-Phe-Ser-Gly-Arg for M. fuscata and Asn-Glu-Glu-Val-Leu-Phe-Gly-Gly-Arg for E. patas. The sequence of the B peptide of M. fuscata differed from that of a close-related species, M. mulatta (rhesus monkey), at a single site, Leu (M.f.)----Pro (M.m.). A single replacement between the B peptides of E. patas and Cercocebus aethiops (green monkey), Val (E.p.)----Gly (C.a.), was detected. A phylogenic relationship of macaques, guenons, and baboons, named Cercopithecinae (Old World monkey), was deduced from the sequence data. A selective rather than random amino acid replacement was observed in the B peptides of these Old World monkeys, suggesting a restricted mutation of their fibrinopeptides during primate evolution.