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Structure of bleomycin A2, NMR structure of bleomycin bound to a DNA cleavage site (full deoxyoligonucleotide and bleomycin disaccharide removed for clarity), key H-bonding role the pyrimidine C4 amine plays in guanine recognition, and role the minor groove guanine C2 amine plays in the recognition of bleomycin.
