2K19:
reference: Nuclear magnetic resonance solution structure of PisI, a group B immunity protein that provides protection against the type IIa bacteriocin piscicolin 126, PisA., Martin-Visscher LA, Sprules T, Gursky LJ, Vederas JC, Biochemistry. 2008 Jun 17;47(24):6427-36. Epub 2008 May 24. PMID: 18500825

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