Immunogen sequence: MASDAVQSEP RSWSLLEQLG LAGADLAAPG VQQQLELERE RLRREIRKEL KLKEGAENLR RATTDLGRSL GPVELLLRGS SRRLDLLHQQ LQELHAHVVL PDPAATHDGP QSPGAGGPTC SATNLSRVAG LEKQLAIELK VKQGAENMIQ TYSNGSTKDR KLLLTAQQML QDSKTKIDII RMQLRRALQA GQLENQAAPD DTQGSPDLGA VEL