Immunogen sequence: PTAQHLRQSS FEIPDDVPLP AGWEMAKTSS GQRYFLNHID QTTTWQDPRK AMLSQMNVTA PTSPPVQQNM MNSASGPLPD GWEQAMTQDG EIYYINHKNK TTSWLDPRLD PRFAMNQRIS QSAPVKQPPP LAPQSPQGGV MGGSNSNQQQ QMRLQQLQME KERLRLKQQE LLRQAMRNIN PSTANSPKCQ ELALRSQLPT LEQDGGTQNP VSS