FIG. 2.
Effect of irradiation on coding end processing in SCID thymic lymphoma cells. LK6.2 cells were transfected with pDR42 3 h (B) or 0.5 h (C) before treatment with 0 (A) or 100 cGy of γ-irradiation, as indicated. Recombinant pDR42 clones were isolated and sequenced as described for Fig. 1. The frequency of independent recombinants sequenced was 64% (A), 83% (B), and 65% (C). B, before treatment.