6TGK:
reference: Crystal structure of the catalytic C-lobe of the HECT-type ubiquitin ligase E6AP., Ries LK, Liess AKL, Feiler CG, Spratt DE, Lowe ED, Lorenz S, Protein Sci. 2020 Jan 28. doi: 10.1002/pro.3832. PMID: 31994269

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