Claim: RACGAP1, or the Rac GTPase-activating protein 1, belongs to a subtype of Rho GTPases in the Ras superfamily of small G proteins which destroy activated forms of Rho GTPases and stimulate GTP hydrolysis.
Evidence: GTPase-activating proteins (GAPs) bind activated forms of Rho GTPases and stimulate GTP hydrolysis.