NCIt definition : One of the primary bleomycin species in bleomycin sulfate, a mixture of the sulfate
salts of glycopeptide bleomycin A2 and B2 isolated from Streptomyces verticillus with
potential antineoplastic activity. Bleomycin B2 forms complexes with iron that reduce
molecular oxygen to superoxide and hydroxyl radicals which cause single- and double-stranded
breaks in DNA; these reactive oxygen species also induce lipid peroxidation, carbohydrate
oxidation, and alterations in prostaglandin synthesis and degradation.;