1CFB:
reference: Crystal structure of tandem type III fibronectin domains from Drosophila neuroglian at 2.0 A., Huber AH, Wang YM, Bieber AJ, Bjorkman PJ, Neuron 1994 Apr;12(4):717-31. PMID: 7512815

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