G proteins

G pro·teins

intracellular membrane-associated proteins activated by several (for example, β-adrenergic) receptors; they serve as second messengers or transducers of the receptor-initiated response to intracellular elements such as enzymes to initiate an effect. These proteins have a high affinity for guanine nucleotides and hence are named G proteins. Synonym(s): G-protein, GTP binding proteins, guanine nucleotide-binding protein, guanine-binding protein

G proteins

Cell messengers that relay signals from over 1000 different cell membrane receptors to many different intracellular effectors such as enzymes and ion channels. G proteins have three subunits, alpha, beta, and gamma, each coded for by a different gene, selected from a total of 34 genes. G protein function is switched on and off by the binding and hydrolysis of guanosine triphosphate to the alpha subunit which is loosely attached to the others. Binding causes the beta and gamma fragments to separate as a dimer and to activate downstream effectors.

单词	g proteins
释义	DictionarySeeG-proteinEncyclopediaSeeG protein G proteins G pro·teins intracellular membrane-associated proteins activated by several (for example, β-adrenergic) receptors; they serve as second messengers or transducers of the receptor-initiated response to intracellular elements such as enzymes to initiate an effect. These proteins have a high affinity for guanine nucleotides and hence are named G proteins. Synonym(s): G-protein, GTP binding proteins, guanine nucleotide-binding protein, guanine-binding protein G proteins Cell messengers that relay signals from over 1000 different cell membrane receptors to many different intracellular effectors such as enzymes and ion channels. G proteins have three subunits, alpha, beta, and gamma, each coded for by a different gene, selected from a total of 34 genes. G protein function is switched on and off by the binding and hydrolysis of guanosine triphosphate to the alpha subunit which is loosely attached to the others. Binding causes the beta and gamma fragments to separate as a dimer and to activate downstream effectors.
随便看	european sea bass european seabass european sea bream european sea eagle european secondary heads association european section european secure business alliance european secure vehicle alliance european securities markets expert group european securities network european security and defense policy european security and defense program european security & defence analysis group european security forum european seismological commission european selective paging association european semantic systems initiative european semantic technology conference european semantic web conference european seminars on diagnostic and interventional radiology european senior police officers course european series in applied and industrial mathematics european serins european services forum european sexual awareness event