Immunogen sequence: STTIKVMEKP PFDRSISQDS LDELSMEDYW IELENIKKSS ENSQEDQEVV VVKEPDEGEL EEEWLKEAGL SNLFGESAGD PQESI Highest antigen sequence identity to the following orthologs: Mouse - 79%, Rat - 78%. ARHGAP18 is one member of the human RhoGAP family with