1ERI:
reference: Refinement of Eco RI endonuclease crystal structure: a revised protein chain tracing., Kim YC, Grable JC, Love R, Greene PJ, Rosenberg JM, Science 1990 Sep 14;249(4974):1307-9. PMID: 2399465

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