Immunogen sequence: GPAGPAGAEA AKQCSPCSAA AQSSSGPAAL PYGYFGSGYY PCARMGPHPN AIKSCAQPAS AAAAAAFADK YMDTAGPAAE EFSSRAKEFA FYHQGYAAGP YHHHQPMPGY LDMPVVPGLG GPGESRHEPL GLPMESYQPW ALPNGWNGQM YCPKEQAQPP HLWKSTLPDV VSHPSDASSY R; Positive Samples: 22RV1, HT-29; C