Immunogen sequence: LPGCEPCHKK VCAHGTCQPS SQAGFTCECQ EGWMGPLCDQ RTNDPCLGNK CVHGTCLPIN AFSYSCKCLE GHGGVLCDEE EDLFNPCQAI KCKHGKCRLS GLGQPYCECS SGYTGDSCDR EISCRGERIR DYYQKQQGYA ACQTTKKVSR LECRGGCAGG QCCGPLRSKR RKYSFECTDG SSFVDEVEKV VKCGCTRCVS; Positive Samp