Immunogen sequence: LLCYSCKAQVS NEDCLQVENC TQLGEQCWTA RIRAVGLLTV ISKGCSLNCV DDSQDYYVGK KNITCCDTDL CNASGAHALQ PAAAILALLP ALGLLLW Highest antigen sequence identity to the following orthologs - mouse 59%, rat 60%. PSCA (Prostate Stem Cell antigen) is a cell