2MCM:
reference: Crystal structure analysis of auromomycin apoprotein (macromomycin) shows importance of protein side chains to chromophore binding selectivity., Van Roey P, Beerman TA, Proc Natl Acad Sci U S A. 1989 Sep;86(17):6587-91. PMID: 2771945

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