1HIO:
reference: The nucleosomal core histone octamer at 3.1 A resolution: a tripartite protein assembly and a left-handed superhelix., Arents G, Burlingame RW, Wang BC, Love WE, Moudrianakis EN, Proc Natl Acad Sci U S A 1991 Nov 15;88(22):10148-52. PMID: 1946434

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