Chapter 18.7 The TNT refinement package
Crystallography of biological macromolecules
Second Online Edition (2012)
Part 18. Refinement
Published Online: 14 APR 2012
© International Union of Crystallography 2006
International Tables for Crystallography
How to Cite
Tronrud, D. E. and Ten Eyck, L. F. 2012. The TNT refinement package. International Tables for Crystallography. F:18:18.7:520–524.
- Published Online: 14 APR 2012
The TNT refinement package was created in the late 1970s and its development continued for about 25 years. Its design included many features not present in its contemporaries and allowed for the testing and addition of many novel tools during its lifespan. These include the implementation of stereochemical restraints to molecules in other asymmetric units (both bonded and non-bonded), space-group-optimized fast Fourier transforms, which allowed rapid crystallographic calculations, and a quick and easy method to model the scattering of bulk solvent, which allowed the use of low-resolution data in refinement. TNT is no longer being developed by its original authors but its code has been included in Global Phasing, Ltd’s program Buster, where considerable improvements have been made.
- macromolecular refinement;
- preconditioned conjugate-gradient method;
- bulk solvent scattering