Duocarmycin A, an antitumor antibiotic, is a DNA alkylator and efficiently alkylates adenine N3 at the 3′ end of AT-rich sequences in the DNA. Duocarmycin A, as a chemotherapeutic agent, results in HLC-2 cells typically apoptotic changes.

[1] Hirota M, et al. Distamycin A enhances the cytotoxicity of duocarmycin A and suppresses duocarmycin A-induced apoptosis in human lung carcinoma cells. Int J Biochem Cell Biol. 2007;39(5):988-96.