Immunogen sequence: MGCMKSKFLQ VGGNTFSKTE TSASPHCPVY VPDPTSTIKP GPNSHNSNTP GIREAGSEDI IVVALYDYEA IHHEDLSFQK GDQMVVLEES GEWWKARSLA TRKEGYIPSN YVARVDSLET EEWFFKGISR KDAERQLLAP GNMLGSFMIR DSETTKGSYS LSVRDYDPRQ GDTVKHYKIR TLDNGGFYIS PRSTFSTLQE LVDHYKKGND GLC