5GU4:
reference: Crystal Structure of Ribosome-Inactivating Protein Ricin A Chain in Complex with the C-Terminal Peptide of the Ribosomal Stalk Protein P2., Shi WW, Tang YS, Sze SY, Zhu ZN, Wong KB, Shaw PC, Toxins (Basel). 2016 Oct 13;8(10). pii: E296. PMID: 27754366

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