4AID:
reference: Crystal structure of Caulobacter crescentus polynucleotide phosphorylase reveals a mechanism of RNA substrate channelling and RNA degradosome assembly., Hardwick SW, Gubbey T, Hug I, Jenal U, Luisi BF, Open Biol. 2012 Apr;2(4):120028. PMID: 22724061

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