Immunogen sequence: MGGCFSKPKP VELKIEVVLP EKERGKEELS ASGKGSPRAY QGNGTARHFH TEERLSTPHP YPSPQDCVEA AVCHVKDLEN GQMREVELGW GKVLLVKDNG EFHALGHKCP HYGAPLVKGV LSRGRVRCPW HGACFNISTG DLEDFPGLDS LHKFQVKIEK EKVYVRASKQ ALQLQRRTKV MAKCISPSAG YSSSTNVLIV; Positive Samp