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Stability of GROs in serum-containing medium and in nuclear extract. GROs were incubated with (A) 10% FBS or (B) 100 µg of nuclear extract at different times (0–96 h). Samples were analyzed by 16% polyacrylamide gel electrophoresis. Co = oligonucleotide alone, S = fetal bovine serum, lys = nuclear lysate.
