3PIP:
reference: Crystal structure of the synergistic antibiotic pair, lankamycin and lankacidin, in complex with the large ribosomal subunit., Belousoff MJ, Shapira T, Bashan A, Zimmerman E, Rozenberg H, Arakawa K, Kinashi H, Yonath A, Proc Natl Acad Sci U S A. 2011 Feb 15;108(7):2717-22. Epub 2011 Jan 31. PMID: 21282615

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