5XNT:
reference: Crystal Structure and Functional Characterization of a Cytochrome P450 (BaCYP106A2) from Bacillus sp. PAMC 23377., Kim KH, Lee CW, Dangi B, Park SH, Park H, Oh TJ, Lee JH, J Microbiol Biotechnol. 2017 Aug 28;27(8):1472-1482. doi: 10.4014/jmb.1706.06013. PMID: 28633515

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