1VT5:
reference: The crystal structure of d(CCCCGGGG): a new A-form variant with an extended backbone conformation., Haran TE, Shakked Z, Wang AH, Rich A, J Biomol Struct Dyn. 1987 Oct;5(2):199-217. PMID: 3271472

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).