Cek8|Hek8|rb|Sek|Tyro1|2900005C20Rik|Sek1 Sek1 2900005C20Rik genetic mapping Cek8 http://identifiers.org/mgd/MGI:98277 protein coding gene Hek8 - Epha4 Eph receptor A4 Gene Sek O rb Tyro1 MGI:98277