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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 3.3.1.
     posted by bugman, Thu 09 Oct 2014 03:04:28 PM UTC - 2 replies


This is a minor feature and bugfix release. It includes the addition of the error_analysis.covariance_matrix, ...

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relax version 3.3.0.
     posted by bugman, Fri 05 Sep 2014 10:21:38 AM UTC - 6 replies


This is a major feature release which includes a huge number of changes, as can be seen below. The most important change is an incredible speed up of all relaxation dispersion models. See the table below for a comparison to the ...

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relax version 3.2.3.
     posted by bugman, Thu 03 Jul 2014 12:10:24 PM UTC - 1 reply


This is a major bugfix release and the first requiring numpy >= 1.6 to allow for faster calculations for certain analyses. There have been improvements to the GUI user functions, the ^[[?1034h escape code is finally suppressed ...

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relax version 3.2.2.
     posted by bugman, Thu 05 Jun 2014 02:15:52 PM UTC - 1 reply


This is a major feature and bugfix release. It includes a large speed up of all analytic relaxation dispersion models, the correct handling of edge case failures in all models of the dispersion analysis, a number of fixes for the ...

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