3T1W:
reference: Extra-domain B in Oncofetal Fibronectin Structurally Promotes Fibrillar Head-to-tail Dimerization of Extracellular Matrix Protein., Schiefner A, Gebauer M, Skerra A, J Biol Chem. 2012 May 18;287(21):17578-88. Epub 2012 Mar 22. PMID: 22442152

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