Improved free energies for G.C base-pairs
- PMID: 4057259
- DOI: 10.1016/0022-2836(85)90077-4
Improved free energies for G.C base-pairs
Abstract
Thermodynamic parameters of helix formation are reported for seven oligoribonucleotides containing only G.C pairs. These data are used with the nearest-neighbor model to calculate enthalpies and free energies of base-pair formation for G.C pairs. For helix initiation, the free energy change at 37 degrees C, delta G(0)37, is +3.9 kcal/mol; for helix propagation, the delta G(0)37 values are -2.3, -3.2 and -3.3 kcal/mol for C-G, G-G and G-C neighbors, respectively.
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