Immunogen sequence: MPPSPLDDRV VVALSRPVRP QDLNLCLDSS YLGSANPGSN SHPPVIATTV VSLKAANLTY MPSSSGSARS LNCGCSSASC CTVATYDKDN QAQTQAIAAG TTTTAIGTST TCPANQMVNN NENTGSLSPS SGVGSPVSGT PKQLASIKII YPNDLAKKMT KCSKSHLPSQ GPVIIDCRPF MEYNKSHIQG AVHINCADKI SRRRLQQGKI TVL