3F5F:
reference: Redirecting the substrate specificity of heparan sulfate 2-O-sulfotransferase by structurally guided mutagenesis., Bethea HN, Xu D, Liu J, Pedersen LC, Proc Natl Acad Sci U S A. 2008 Dec 2;105(48):18724-9. Epub 2008 Nov 20. PMID: 19022906

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