Roles of G protein subunits in transmembrane signalling.
A family of proteins called G proteins couples cell surface receptors to a variety of enzymes and ion channels. Since many cells contain several very similar G proteins, an important question is how signals remain specific as they cross the cell membrane.
D000818:Animals; D002450:Cell Communication; D002462:Cell Membrane / Q000502:physiology*; D019204:GTP-Binding Proteins / Q000502:physiology*
D019204:GTP-Binding Proteins