5TUF:
reference: Plasticity, dynamics, and inhibition of emerging tetracycline resistance enzymes., Park J, Gasparrini AJ, Reck MR, Symister CT, Elliott JL, Vogel JP, Wencewicz TA, Dantas G, Tolia NH, Nat Chem Biol. 2017 May 8. doi: 10.1038/nchembio.2376. PMID: 28481346

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