Immunogen sequence: CKIMIPSAQQ EIGRSQQQFL IHQQSGEQKK RNGIMTNPNY HLQSNQVFLG RVSVPRTMQD RGHQEVLEGY PSSETELSLK QALKLQIEGS DPSFN Highest antigen sequence identity to the following orthologs: Mouse - 83%, Rat - 84%. Involved in the endosome-to-plasma membrane