| Homo sapiens | RAC1 - Ras-related C3 botulinum toxin substrate 1 precursor (p21-Rac1) (Ras- like protein TC25) (Cell migration-inducing gene 5 protein); Plasma membrane-associated small GTPase which cycles between active GTP-bound and inactive GDP-bound states. In its active state, binds to a variety of effector proteins to regulate cellular responses such as secretory processes, phagocytosis of apoptotic cells, epithelial cell polarization and growth-factor induced formation of membrane ruffles |