Changes

= Description =

After four years of development by numerous NMR spectroscopists, the relaxation dispersion analysis in relax is finally ready for release [Morin et al., 2014]! This support is complete and includes almost all analytic and numeric dispersion models in existence. These have been labelled as [[R2eff]], [[No Rex]], [[LM63]] [Luz and Meiboom 1963], [[LM63 3-site]] [Luz and Meiboom 1963], [[CR72]] [Carver and Richards 1972], [[IT99]] [Ishima and Torchia 1999], [[TSMFK01]] [Tollinger et al., 2001], [[NS CPMG 2-site expanded]], [[NS CPMG 2-site 3D]], [[NS CPMG 2-site star]], [[M61]] [Meiboom 1961], [[DPL94]] [Davis et al., 1994], [[TP02]] [Trott and Palmer 2002], [[TAP03]] [Trott et al., 2003], [[MP05]] [Miloushev and Palmer 2005], [[NS R1rho 2-site]], [[MQ CR72]], and [[MMQ 2-site]], mainly named after the authors and publication date. It includes support for single, zero, double, and multiple quantum CPMG data, including combined proton-heteronuclear data, and off-resonance R_1ρ data. An automated protocol has been developed to simplify the analysis and a GUI has been designed around this auto-analysis. Calculations have been [[OpenMPI|parallelised]] at the spin cluster and Monte Carlo simulation level for speed.

= Download =

The new relax versions can be downloaded from http://www.nmr-relax.com/download.html. If binary distributions are not yet available for your platform and you manage to compile the binary modules, please consider contributing these to the relax project (described in section 3.6 of the relax manual, http://www.nmr-relax.com/manual/relax_distribution_archives.html).

= CHANGES file =

Version 3.1.0

(28 November 2013, from /trunk)

http://svn.gna.org/svn/relax/tags/3.1.0

== Features ==

* Full support for the analysis of relaxation dispersion data in the prompt, scripting, and graphical user interfaces.

* Support for single quantum (SQ), zero quantum (ZQ), double quantum (DQ), and multiple quantum (MQ) CPMG-type data.

* Additional methods to speed up the auto-analysis by skipping the grid search: Model nesting, the more complex model starts with the optimised parameters of the simpler; Model equivalence, when two models have the same parameters; And spin clustering, the analysis starts with the averaged parameter values from a completed non-clustered analysis.

* Parallelisation of the dispersion analysis at the level of the spin cluster and Monte Carlo simulation for fast optimisation on computer clusters using OpenMPI.

== Changes ==

* Started to implement the framework for relaxation dispersion system tests.

* Copied 'test_suite/system_tests/relax_fit.py' for relaxation dispersion.

* The relax system test base tearDown() method should now be fail proof. Most code is now warped in a 'try: except: pass' block to catch all failures.

* Improvements in the test_suite.clean_up.deletion() function. It is now more fail safe on Python 3 by completely avoiding the WindowsError checking.

== Bugfixes ==

* Bug fixes for a number of broken Oxygen icon lookups in the GUI.

* Bug fixes for the [http://www.nmr-relax.com/manual/molecule_delete.html molecule.delete], [http://www.nmr-relax.com/manual/residue_delete.html residue.delete] and [http://www.nmr-relax.com/manual/spin_delete.html spin.delete] user functions. The molecule, residue, and spin metadata in the relax data store was not being updated correctly after these user function calls so that any subsequent operations on this data was failing. This metadata problem was not noticed before as it disappears if the state is saved and reloaded into relax after a restart.

= Announcements =

= References =

* [*Carver and Richards 1972] Carver, J. P. and Richards, R. E. (1972). General 2-site solution for chemical exchange produced dependence of T2 upon Carr-Purcell pulse separation. ''J. Magn. Reson.'', '''6'''(1), 89-105. (DOI [http://dx.doi.org/10.1016/0022-2364(72)90090-X 10.1016/0022-2364(72)90090-X]).

* [*d'Auvergne and Gooley 2006] d'Auvergne, E. J. and Gooley, P. R. (2006). Model-free model elimination: A new step in the model-free dynamic analysis of NMR relaxation data. ''J. Biomol. NMR'', '''35'''(2), 117-135. (DOI [http://dx.doi.org/10.1007/s10858-006-9007-z 10.1007/s10858-006-9007-z]).

* [*Trott and Palmer 2002] Trott, O. and Palmer, 3rd, A. G. (2002). R1rho relaxation outside of the fast-exchange limit. ''J. Magn. Reson.'', '''154'''(1), 157-160. (DOI [http://dx.doi.org/10.1006/jmre.2001.2466 10.1006/jmre.2001.2466]).

* [*Trott et al., 2003] Trott, O., Abergel, D., and Palmer, A. (2003). An average-magnetization analysis of R-1 rho relaxation outside of the fast exchange. ''Mol. Phys.'', '''101'''(6), 753-763. (DOI [http://dx.doi.org/10.1080/0026897021000054826 10.1080/0026897021000054826]).

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