| 4JS5: reference: Crystal structures of Escherichia coli exonuclease I in complex with single-stranded DNA provide insights into the mechanism of processive digestion., Korada SK, Johns TD, Smith CE, Jones ND, McCabe KA, Bell CE, Nucleic Acids Res. 2013 Apr 22. PMID: 23609540 |
This OCA 
Structure page
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(documentation).