Brajendra Mishra; A. Fuwa; P. Bhandhubanyong The Minerals, Metals & Materials Society (2008) Saatavuus: Tilaustuote Digitaalinen tallenne, määrittelemätön
Eric M. Taleff; Paul E. Krajewski; Peter A. Friedman; Rajiv S. Mishra; James C. Schroth The Minerals, Metals & Materials Society (2010) Saatavuus: Tilaustuote Pehmeäkantinen kirja
Humana Press Inc. Sivumäärä: 433 sivua Asu: Kovakantinen kirja Painos: 1997 Julkaisuvuosi: 1997, 14.07.1997 (lisätietoa) Kieli: Englanti
The G proteins are a family of structurally homologous, plasma membrane-associated guanine-nucleotide-binding proteins. These proteins play an integral role in the tra- duction of extracellular signals through second messenger systems. As such, G proteins affect a wide variety of intra cellular biochemical reactions by regulating the concent- tion of second messengers in cells. G proteins are heterotrimeric, consisting of a, p, and y polypeptide chains, with G protein specificity largely det- mined by the a-subunit, Molecular cloning of G protein s- units has revealed 23 distinct a-subunits, encoded by 17 different genes. Based on functional measures, G proteins are generally classified into three major categories: the G, family, which is stimulatory for adenylyl cyclase; the G, f- ily, which is inhibitory for adenylyl cyclase; and the G, f- ily, which stimulates phospholipases (Birnbaumer and Birnbaumer, 1995). Alternatively, on the basis of sequence homology, G proteins can be subdivided into four cate- ries: G,, G,, G,, and G12.