Primary structure of the α‐subunit of bovine adenylate cyclase‐inhibiting G‐protein deduced from the cDNA sequence

Abstract
The primary structure of the α‐subunit of the adenylate cyclase‐inhibiting G‐protein (gi) has been deduced from the nucleotide sequence of cloned DNA complementary to the bovine cerebral mRNA encoding the polypeptide. A much higher degree of amino acid sequence homology is observed between the α‐subunits of Gi and transducin (68%) than between those of Gi and the adenylate cyclase‐stimulating G‐protein (Gs) (43%) or between those of transucin and Gs (42%).