XR-C1, a new CHO cell mutant which is defective in DNA-PKcs, is impaired in both V(D)J coding and signal joint formation. - Abdellatif Errami; Dong Ming He; Anna A. Friedl; Wilhelmina J. I. Overkamp; Bruno Morolli; Eric A. Hendrickson; Friederike Eckardt-Schupp; Mitsuo Oshimura; Paul H. M. Lohman; Stephen P. Jackson; Malgorzata Z. Zdzienicka (Nucleic Acids Res., 1998)