Immunogen sequence: DGRWSGGEPV CVDIDPPKIR CPHSREKMAE PEKLTARVYW DPPLVKDSAD GTITRVTLRG PEPGSHFPEG EHVIRYTAYD RAYNRASCKF IVKVQVRRCP TLKPPQHGYL TCTSAGDNYG ATCEYHCDGG YDRQGTPSRV CQSSRQWSGS PPICAPMKIN VNVNSAAGLL DQFYEKQRLL IISAPDPSNR YYKMQISMLQ QSTCGLDLRH VTI