. "Vilse/CrossGAP (CrGAP) a conserved Rac-Specific GAP in Drosophila is involved in Robo mediated repulsion. CrGAP directly binds to Robo both biochemically and genetically. This interaction is mediated by the WW domains in CrGAP and the CC2 motif of Robo.
The human homologue of Vilse/CrGAP, KIAA1688, was identified which shares 54.4% sequence similarity with Drosophila CrGAP and is referred as human Vilse/CrGAP protein."^^ . . . .