Immunogen sequence: MSQQRPARKL PSLLLDPTEE TVRRRCRDPI NVEGLLPSKI RINLEDNVQY VSMRKALKVK RPRFDVSLVY LTRKFMDLVR SAPGGILDLN KVATKLGVRK RRVYDITNVL DGIDLVEKKS KNHIRWIGSD LSNFGAVPQQ KKLQEELSDL SAMEDALDEL IKDCAQQLFE LTDDKENERL AYVTYQDIHS IQAFHEQIVI AVKAPAETRL DVP