sequence of nectin PVRL2_MOUSE CD112 Cd112 Herpes virus entry mediator B Herpesvirus entry mediator B HveB IMR:0700353 MPH Mph Murine herpes virus entry protein B Nectin-2 Poliovirus receptor homolog Poliovirus receptor-related protein 2 Pvr Pvrl2 Pvs UniProt:P32507 mHveB molecule_role nectin-2 poliovirus receptor-related 2