2CNP:
reference: High resolution solution structure of apo calcyclin and structural variations in the S100 family of calcium-binding proteins., Maler L, Potts BC, Chazin WJ, J Biomol NMR 1999 Mar;13(3):233-47. PMID: 10212984

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