4HR7:
reference: The Three-Dimensional Structure of the Biotin Carboxylase-Biotin Carboxyl Carrier Protein Complex of E. coli Acetyl-CoA Carboxylase., Broussard TC, Kobe MJ, Pakhomova S, Neau DB, Price AE, Champion TS, Waldrop GL, Structure. 2013 Mar 12. pii: S0969-2126(13)00041-5. doi:, 10.1016/j.str.2013.02.001. PMID: 23499019

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