4DUK:
reference: Structural insights into the broad substrate specificity of carboxypeptidase T from Thermoactinomyces vulgaris., Akparov VKh, Timofeev VI, Khaliullin IG, Svedas V, Chestukhina GG, Kuranova IP, FEBS J. 2015 Apr;282(7):1214-24. doi: 10.1111/febs.13210. Epub 2015 Feb 18. PMID: 25619204

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