Immunogen sequence: HGKSQNQVRI PSQAQEYGHK ENKISYQSSS TEERRLNSGE KDVQKGVSKG SISIQTEEKI HGKSQNQVTI PSQDQEHGHK ENKMSYQSSS TEERRLNYGG KSTQKDVSQS SISFQIEKLV EGKSQIQTPN PNQDQWSGQN AKGKSGQSAD SKQDLLSHEQ KGRYKQESSE SHNIVITEHE VAQDDHLTQQ YNEDRNPIST; Positive Samp