Immunogen sequence: MASEGLAGAL ASVLAGQGSS VHSCDSAPAG EPPAPVRLRK NVCYVVLAVF LSEQDEVLLI QEAKRECRGS WYLPAGRMEP GETIVEALQR EVKEEAGLHC EPETLLSVEE RGPSWVRFVF LARPTGGILK TSKEADAESL QAAWYPRTSL PTPLRAHDIL HLVELAAQYR QQARHPLILP QELPCDLVCQ RLVATFTSAQ TVWVLVGTVG MPH