Immunogen sequence: HSSPNYEFYK LYLVGGAQGR RCEAPPAPNL LLTCDRPDLD LRFTIKFQEY SPNLWGHEFR SHHDYYIIAT SDGTREGLES LQGGVCLTRG MKVLLRVGQS PRGGAVPRKP VSEMPMERDR GAAHSLEPGK ENLPGDPTSN ATS. EFNB3, a member of the ephrin gene family, is important in brain developmen