3T2X:
reference: Structural Adaptation of a Thermostable Biotin-Binding Protein in a Psychrophilic Environment., Meir A, Bayer EA, Livnah O, J Biol Chem. 2012 Apr 5. PMID: 22493427

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