2DT1:
reference: Carbohydrate-binding properties of goat secretory glycoprotein (SPG-40) and its functional implications: structures of the native glycoprotein and its four complexes with chitin-like oligosaccharides., Kumar J, Ethayathulla AS, Srivastava DB, Singh N, Sharma S, Kaur P, Srinivasan A, Singh TP, Acta Crystallogr D Biol Crystallogr. 2007 Apr;63(Pt 4):437-46. Epub 2007, Mar 16. PMID: 17372347

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