GC-GAP p200RhoGAP PX-RICS Gene genetic mapping MGI:2450166 Rho GTPase activating protein 32 3426406O18Rik Arhgap32 Grit|3426406O18Rik|p200RhoGAP|PX-RICS|GC-GAP Grit + O http://identifiers.org/mgd/MGI:2450166 protein coding gene