Immunogen sequence: CPPRCECSAQ DRAVLCHRKR FVAVPEGIPT ETRLLDLGKN RIKTLNQDEF ASFPHLEELE LNENIVSAVE PGAFNNLFNL RTLGLRSNRL KLIPLGVFTG LSNLTKLDIS ENKIVILLDY MFQDLYNLKS LEVGDNDLVY ISHRAFSGLN SLEQLTLEKC NLTSIPTEAL SHLHGLIVLR LRHLNINAIR DYSFKRLYR; Positive Sampl