1JK7:
reference: Crystal structure of the tumor-promoter okadaic acid bound to protein phosphatase-1., Maynes JT, Bateman KS, Cherney MM, Das AK, Luu HA, Holmes CF, James MN, J Biol Chem 2001 Nov 23;276(47):44078-82. PMID: 11535607

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