Immunogen sequence: VNSSKYPSLL LHSQEEKTST ATSKTQTRLE GEVTPNSLST SYKTVSLPLS SPNIKLNLTS PKRGQKREEG WKEVVRRSKK LSVPASVVSR IMGRGGCNIT AIQDVTGAHI DVDKQKDKNG ERMITIRGGT ESTRYAVQLI NALIQDPAKE LEDLIPKNHI RTPASTKSIH ANFSSGVGTT A. This gene encodes a protein with