1ARO:
reference: Structure of T7 RNA polymerase complexed to the transcriptional inhibitor T7 lysozyme., Jeruzalmi D, Steitz TA, EMBO J 1998 Jul 15;17(14):4101-13. PMID: 9670025

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