1KVC:
reference: Proposal for new catalytic roles for two invariant residues in Escherichia coli ribonuclease HI., Kashiwagi T, Jeanteur D, Haruki M, Katayanagi K, Kanaya S, Morikawa K, Protein Eng 1996 Oct;9(10):857-67. PMID: 8931125

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