145D:
reference: Structure and thermodynamics of nonalternating C.G base pairs in Z-DNA: the 1.3-A crystal structure of the asymmetric hexanucleotide d(m5CGGGm5CG).d(m5CGCCm5CG)., Schroth GP, Kagawa TF, Ho PS, Biochemistry 1993 Dec 14;32(49):13381-92. PMID: 8257675

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