1IIR:
reference: Structure of the UDP-glucosyltransferase GtfB that modifies the heptapeptide aglycone in the biosynthesis of vancomycin group antibiotics., Mulichak AM, Losey HC, Walsh CT, Garavito RM, Structure (Camb) 2001 Jul 3;9(7):547-57. PMID: 11470430

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