6HQI:
reference: Biochemical and structural characterization of tomato polyphenol oxidases provide novel insights into their substrate specificity., Kampatsikas I, Bijelic A, Rompel A, Sci Rep. 2019 Mar 11;9(1):4022. doi: 10.1038/s41598-019-39687-0. PMID: 30858490

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