It was generally assumed that these receptors existed as monomers and coupled to G proteins in a 1:1 stoichiometric ratio. However, these classical models of receptor/G protein coupling may be ...
which are activated by G protein–coupled receptors (GPCRs) and consist of alpha, beta, and gamma subunits, and the monomeric small G proteins, which belong to the Ras superfamily of small GTPases.