Immunogen sequence: MSAPAQPPAE GTEGTAPGGG PPGPPPNMTS NRRLQQTQAQ VEEVVDIIRV NVDKVLERDQ KLSELDDRAD ALQAGASQFE SSAAKLKRKY WWKNCK; Positive Samples: Mouse brain, Rat brain; Cellular Location: Cell junction, Cytoplasmic vesicle, Cytoplasmic vesicle membrane,