1ZQR: Dna Polymerase Beta (E.C.2.7.7.7)Dna Complex, Soaked In The Presence Of Nicl2
reference: Characterization of the metal ion binding helix-hairpin-helix motifs in human DNA polymerase beta by X-ray structural analysis., Pelletier H, Sawaya MR, Biochemistry 1996 Oct 1;35(39):12778-87. PMID: 8841120

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