1RMG:
reference: The crystal structure of rhamnogalacturonase A from Aspergillus aculeatus: a right-handed parallel beta helix., Petersen TN, Kauppinen S, Larsen S, Structure 1997 Apr 15;5(4):533-44. PMID: 9115442

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