Immunogen sequence: RSPHVAHHSP HTNHPNAWGA SPAPNPSITS SGQPLNVYSQ PGFTVSGMLE HGGLTPPPAA ASAQSLHPVL REPPDHGELG SHHCQDH Highest antigen sequence identity to the following orthologs: Mouse - 98%, Rat - 98%. POU3F4 (brain-specific homeobox/POU domain protein 4