Chemotherapeutic Drugs and Oncogenes ...187 Effect of pM C540 on c-myc Oncogene in Leukemia ...188 Down Regulation of c-myc by pMC540 ...189 Effect of pMC540 on c-myc Proteins ...192 Tumorigenesis of pMC540 Treated but Living L1210 Leukemia Cells ...195 Stimulation ofTopoisomerase 11-Induced Cleavage Sites in a c-myc Oncogene by pMC540 ...197 Epilogue ...203 Index ...209 =======================PREFACE ========================= his book describes the discovery of a new technology termed "preactiva- T tion. " Preactivation is a process by which photoactive compounds are first exposed to light...