GAP activity, ARF GAP activity, ARF GTPase activator activity, Rab GAP activity, Rab GTPase activator activity, Rac GAP activity, Rac GTPase activator activity, Ral GAP activity, Ral GTPase activator activity, Ran GAP activity, Ran GTPase activator activity, RanGAP, Rap GAP activity, Rap GTPase activator activity, Ras GAP activity, Ras GTPase activator activity, Rho GAP activity, Rho GTPase activator activity, Sar GAP activity, Sar GTPase activator activity