APBB1IP (Hsap) RIAM Rap1-GTP-interacting adaptor molecule rap1-GTP-interacting adapter molecule INAG1 retinoic acid-responsive proline-rich protein 1 amyloid beta A4 precursor protein-binding family B member 1-interacting protein RARP-1 proline rich EVH1 ligand 1 APBB1-interacting protein 1 PREL1 proline-rich protein 73 Rap1-interacting adaptor molecule RARP1 PREL-1 gene