“…(1975a); chick, Kang and Gross (1970a); pig, Allam and Heidemann (1974); human and baboon, Click and , Epstein et al (1971). α2: Bovine, Fietzek et al (1974b); rat, Kang et al (1967); rabbit, Becker et al (1975a); chick, Kang and Gross (1970a); pig, Allam and Heidemann (1974); baboon and human, Click and , Epstein et al (1971). charged amino acids is less strict but, rather commonly, adjacent triplets conserve the basic charge distribution seen in the other three chains.…”