XRCC5, ID (K439) (XRCC5, G22P2, X-ray repair cross-complementing protein 5, 86kD subunit of Ku antigen, ATP-dependent DNA helicase 2 subunit 2, ATP-dependent DNA helicase II 80kD subunit, CTC box-binding factor 85kD subunit, DNA repair protein XRCC5, Ku80