| 3RR7: reference: Amino acid templating mechanisms in selection of nucleotides opposite abasic sites by a family A DNA polymerase., Obeid S, Welte W, Diederichs K, Marx A, J Biol Chem. 2012 Feb 7. PMID: 22318723 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).