Immunogen sequence: RKNSARKASI VKNLKDTLGI GKVKRKPSVP DSASPADDSF VDPGERLYDL NMPAYVKFNY MAEREDELSL IKGTKVIVME KCSDGWWRGS YNGQVGWFPS NYVTEEGDSP LGDHVGSLSE KLAAVVNNLN TGQVLHVVQA LYPFSSSNDE ELNFEKGDVM DVIEKPENDP EWWKCRKING MVGLVPKNYV TVMQNNPLTS GLEPSPPQCD YIR