1CSG:
reference: Three-dimensional structure of recombinant human granulocyte-macrophage colony-stimulating factor., Walter MR, Cook WJ, Ealick SE, Nagabhushan TL, Trotta PP, Bugg CE, J Mol Biol 1992 Apr 20;224(4):1075-85. PMID: 1569568

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