1D39:
reference: Covalent modification of guanine bases in double-stranded DNA. The 1.2-A Z-DNA structure of d(CGCGCG) in the presence of CuCl2., Kagawa TF, Geierstanger BH, Wang AH, Ho PS, J Biol Chem 1991 Oct 25;266(30):20175-84. PMID: 1939078

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