Immunogen sequence: VLRGSSVIHC DADSKWNPSP PACEPNSCTN LPDIPHASWE TYPRPTKEDV YVVGTVLRYR CHPGYKPTTD EPTTVICQKN LRWTPYQGCE ALCCPEPKLN NGEITQHRKS RPANHCVYFY GDEISFSCHE TSRFSAICQG DG. There are 3 variants of Complement component 4 binding protein (C4bp), which