2GAP:
reference: Model of specific complex between catabolite gene activator protein and B-DNA suggested by electrostatic complementarity., Weber IT, Steitz TA, Proc Natl Acad Sci U S A 1984 Jul;81(13):3973-7. PMID: 6377305

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