3.6.5.1 heterotrimeric G-protein GTPase - 3.6.5.2 small monomeric GTPase - 3.6.5.3 protein-synthesizing GTPase - 3.6.5.4 signal-recognition-particle GTPase - 3.6.5.5 dynamin GTPase - 3.6.5.6 tubulin GTPase -