Immunogen sequence: HRLPRRRKRE SVAKMSFRAA AALMKGRSVR DGTFRRAQRR SFTPASFLEE DTTDFPDELD TSFFAREGIL HEELSTYPDE VFESPSEAAL KDWEKAPEQA DLTGGALDRS ELERSHLMLP LERGWRKQKE GAAAPQPKVR LRQEVVSTAG PRRGQRIAVP VRKLFAREKR PYGLGMVGRL TNRTYRKRID SFVKRQIEDM D. RHBDF1 is a