3GKW:
reference: Nimotuzumab, an antitumor antibody that targets the epidermal growth factor receptor, blocks ligand binding while permitting the active receptor conformation., Talavera A, Friemann R, Gomez-Puerta S, Martinez-Fleites C, Garrido G, Rabasa A, Lopez-Requena A, Pupo A, Johansen RF, Sanchez O, Krengel U, Moreno E, Cancer Res. 2009 Jul 15;69(14):5851-9. Epub 2009 Jul 7. PMID: 19584289

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