6QM2:
reference: Crystal Structure and Directed Evolution of Specificity of NlaIV Restriction Endonuclease., Czapinska H, Siwek W, Szczepanowski RH, Bujnicki JM, Bochtler M, Skowronek KJ, J Mol Biol. 2019 Apr 14. pii: S0022-2836(19)30204-9. doi:, 10.1016/j.jmb.2019.04.010. PMID: 30995450

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