1KKS:
reference: Structure of the histone mRNA hairpin required for cell cycle regulation of histone gene expression., Zanier K, Luyten I, Crombie C, Muller B, Schumperli D, Linge JP, Nilges M, Sattler M, RNA 2002 Jan;8(1):29-46. PMID: 11871659

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