Immunogen sequence: QKGGSKGRLP SEFSQFPHGQ KGQHYSGQKG KQQTESKGSF SIQYTYHVDA NDHDQSRKSQ QYDLNALHKT TKSQRHLGGS QQLLHNKQEG RDHDKSKGHF HRVVIHHKGG KAHRGTQNPS QDQGNSPSGK GISSQYSNTE ERLWVHGLSK EQTSVSGAQK GRKQGGSQSS YVLQTEELVA NKQQRETKNS HQNKGHYQNV VEVREEHSSK VQT