Rebeccamycin is an antitumor antibiotic+ inhibits DNA topoisomerase I. Rebeccamycin appears to exert its primary antineoplastic effect by poisoning topoisomerase I. It also has a negligible effect on protein kinase C and topoisomerase II.
Carubicin is an anthracycline antineoplastic antibiotic isolated from the bacterium Actinomadura carminata. Carubicin intercalates into DNA and interacts with topoisomerase II, thereby inhibiting DNA replication and repair and RNA and protein synthesis.
Carubicin HCl is an anthracycline antineoplastic antibiotic. Through intercalates into DNA and interacts with topoisomerase II, Carubicin inhibits DNA replication and repair and RNA and protein synthesis.