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	sexual stereotypes sexual stereotyping sexual stimulant sexual surrogate sexual symptom distress scale sexual tension sexual therapy sexual traffic sexual transgression sexual transmission sexual trauma treatment, advocacy and recovery sexual union sexual urge sexual violation sexual violence sexual violence awareness month sexual violence in conflict zones sexual violence prevention coordinator sexual whipping sexual work sexuoerotic sexuoerotic body image fixation sexuoerotic rehearsal play sexuology sex up