5IPW:
reference: Crystal structure of a putative oligopeptide-binding periplasmic protein from a hyperthermophile., Yoon HJ, Kim HJ, Mikami B, Yu YG, Lee HH, Extremophiles. 2016 Sep;20(5):723-31. doi: 10.1007/s00792-016-0861-7. Epub 2016, Jul 5. PMID: 27377296

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