3PVI:
reference: Asp34 of PvuII endonuclease is directly involved in DNA minor groove recognition and indirectly involved in catalysis., Horton JR, Nastri HG, Riggs PD, Cheng X, J Mol Biol 1998 Dec 18;284(5):1491-504. PMID: 9878366

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