1AZX:
reference: The anticoagulant activation of antithrombin by heparin., Jin L, Abrahams JP, Skinner R, Petitou M, Pike RN, Carrell RW, Proc Natl Acad Sci U S A 1997 Dec 23;94(26):14683-8. PMID: 9405673

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