1SC5:
reference: Crystal structure of the flagellar sigma/anti-sigma complex sigma(28)/FlgM reveals an intact sigma factor in an inactive conformation., Sorenson MK, Ray SS, Darst SA, Mol Cell 2004 Apr 9;14(1):127-38. PMID: 15068809

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