Immunogen sequence: DTTSPMELAA LEKIKSTWIK NQDDSLTETD TLEITDQDMF GDASTSLVVP EKVKTPMKSS KTDLQGSASP SKVEGVHTPR QKRSTPLKER QLSKPLSE Highest antigen sequence identity to the following orthologs: Mouse - 96%, Rat - 97%. PACS-1 (CRA_a) is a 963 amino acid rich