Immunogen sequence: VCASGPRTLV LLDNLNVRET HSLFFRSLKD RGFELTFKTA DDPSLSLIKY GEFLYDNLII FSPSVEDFGG NINVETISAF IDGGGSVLVA ASSDIGDPLR ELGSECGIEF DEEKTAVIDH HNYDISDLGQ HTLIVADTEN LLKAPTIVGK SSLNPILFRG VGMVADPDNP LVLDILTGSS TSYSFFPDKP ITQYPHAVGK NTLLIAGLQA RNN