| 1VTR: reference: Structure of the deoxytetranucleotide d-pApTpApT and a sequence-dependent model for poly(dA-dT)., Viswamitra MA, Shakked Z, Jones PG, Sheldrick GM, Salisbury SA, Kennard O, Biopolymers. 1982 Mar;21(3):513-33. PMID: 7066470 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).