Immunogen sequence: RQAPSLPLPG RVGSDTVRGQ ARHPFGFGQV PDNWREVAVG DSTGMARART SVSQQRHGGS ASSVSASAFA STYRQQPSYP QQFPYPQAPF VSQYENYDPA SRTYDQGFVY YRPAGGGVGA GAAAVASAGV IYPYQPRARY EEYGGGEELP EYPPQGFYPA PERPYVPPPP PPPDGLDRRY SHSLYSEGTP GFEQAYPDPG PEAAQAHGGD PRL