Other Notes Antineoplastic agent2; substrate for HGPRTase, converted to 6-thio-GMP, which then inhibits vital metabolic sequences in myelocytic and acute lymphocytic leukemia.1 Biochem/physiol Actions Ribosylated and phosphorylated by the same pathway as natural purine bases; as the nucleotide, inhibits a variety of cellular processes involved in nucleic acid synthesis. Has a long history as an effective treatment of leukemia.1 |