Induction of DNA degradation in Raji nuclei by the t-BHP–treated HL-60 cytosolic extract. (A) The t-BHP–treated HL-60 cytosolic extract induced DNA degradation in Raji nuclei as well as in HL-60 nuclei. (B) The cell-free cytosolic extract from t-BHP–treated Raji cells did not induce DNA degradation in either HL-60 or Raji nuclei.