1CLB:
reference: Determination of the solution structure of Apo calbindin D9k by NMR spectroscopy., Skelton NJ, Kordel J, Chazin WJ, J Mol Biol 1995 Jun 2;249(2):441-62. PMID: 7783203

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