1BHM:
reference: Structure of Bam HI endonuclease bound to DNA: partial folding and unfolding on DNA binding., Newman M, Strzelecka T, Dorner LF, Schildkraut I, Aggarwal AK, Science 1995 Aug 4;269(5224):656-63. PMID: 7624794

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