| 2FLN: reference: An incoming nucleotide imposes an anti to syn conformational change on the templating purine in the human DNA polymerase-iota active site., Nair DT, Johnson RE, Prakash L, Prakash S, Aggarwal AK, Structure. 2006 Apr;14(4):749-55. PMID: 16615915 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).