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Id: #1418
System Name: relax
Name: relax
Group Type: Programs

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The software package 'relax' is designed for the study of molecular dynamics through the analysis of experimental NMR data. Organic molecules, proteins, RNA, DNA, sugars, and other biomolecules are all supported. It supports exponential curve fitting for the calculation of the R1 and R2 relaxation rates, calculation of the NOE, reduced spectral density mapping, the Lipari and Szabo model-free analysis, study of domain motions via the N-state model and frame order dynamics theories using anisotropic NMR parameters such as RDCs and PCSs, the investigation of stereochemistry in dynamic ensembles, and the analysis of relaxation dispersion data.


The relax homepage is located at The relax wiki is located at


Registration Date: Thu 08 Dec 2005 05:25:14 AM UTC
License: GNU General Public License V3 or later
Development Status: 5 - Production/Stable


Latest News 
relax version 4.0.1.
     posted by bugman, Tue 15 Dec 2015 01:43:21 PM UTC - 1 reply


This is a major feature and bugfix release. Features include the new structure.pca user function for performing a principle component analysis (PCA) of a set of structures, ...

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relax version 4.0.0.
     posted by bugman, Wed 14 Oct 2015 01:11:36 PM UTC - 1 reply


This is a major feature release for a new analysis type labelled 'frame order'. The frame order theory aims to unify all rotational molecular physics data sources via a single mechanical model. It is a bridging physics theory ...

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relax version 3.3.9.
     posted by bugman, Thu 01 Oct 2015 12:51:08 PM UTC - 1 reply


This is a minor feature release with improvements to the automatic relaxation dispersion protocol for repeated CPMG data, support for Monte Carlo or Bootstrap simulating RDC and PCS Q factors, a huge speedup of Monte Carlo ...

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relax version 3.3.8.
     posted by bugman, Thu 02 Apr 2015 12:07:43 PM UTC - 0 replies


This is a minor bugfix release which allows the relax GUI to be used on screens with the low resolution of 1024x768 pixels.

For the official, easy to navigate release notes, please see ...

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