2WNB:
reference: Structural insight into mammalian sialyltransferases., Rao FV, Rich JR, Rakic B, Buddai S, Schwartz MF, Johnson K, Bowe C, Wakarchuk WW, Defrees S, Withers SG, Strynadka NC, Nat Struct Mol Biol. 2009 Oct 11. PMID: 19820709

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