1BG4:
reference: Structure of the xylanase from Penicillium simplicissimum., Schmidt A, Schlacher A, Steiner W, Schwab H, Kratky C, Protein Sci 1998 Oct;7(10):2081-8. PMID: 9792094

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