4HXH:
reference: Structure of histone mRNA stem-loop, human stem-loop binding protein, and 3'hExo ternary complex., Tan D, Marzluff WF, Dominski Z, Tong L, Science. 2013 Jan 18;339(6117):318-21. doi: 10.1126/science.1228705. PMID: 23329046

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