Immunogen sequence: MSLLCVRVKR AKFQGSPDKF NTYVTLKVQN VKSTTVAVRG DQPSWEQDFM FEISRLDLGL SVEVWNKGLI WDTMVGTVWI ALKTIRQSDE EGPGEWSTLE AETLMKDDEI CGTRNPTPHK ILLDTRFELP FDIPEEEARY WTYKWEQINA LGADNEYSSQ EESQRKPLPT AAAQCSFEDP DSAVDDRDSD YRSETSNSFP PPYHTASQPN ASV