2a7e

<StructureSection load='2a7e' size='340' side='right' caption='[[2a7e]], [[Resolution|resolution]] 1.66&Aring;' scene=''>

<table><tr><td colspan='2'>[[2a7e]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2A7E OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2A7E FirstGlance]. <br>

</td></tr><tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2a7e FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2a7e OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2a7e RCSB], [http://www.ebi.ac.uk/pdbsum/2a7e PDBsum]</span></td></tr>

Complete and highly redundant data sets were collected at different wavelengths between 0.80 and 2.65 A for a total of ten different protein and DNA model systems. The magnitude of the anomalous signal-to-noise ratio as assessed by the quotient R(anom)/R(r.i.m.) was found to be influenced by the data-collection wavelength and the nature of the anomalously scattering substructure. By utilizing simple empirical correlations, for instance between the estimated deltaF/F and the expected R(anom) or the data-collection wavelength and the expected R(r.i.m.), the wavelength at which the highest anomalous signal-to-noise ratio can be expected could be estimated even before the experiment. Almost independent of the nature of the anomalously scattering substructure and provided that no elemental X-ray absorption edge is nearby, this optimal wavelength is 2.1 A.

 

On the routine use of soft X-rays in macromolecular crystallography. Part III. The optimal data-collection wavelength.,Mueller-Dieckmann C, Panjikar S, Tucker PA, Weiss MS Acta Crystallogr D Biol Crystallogr. 2005 Sep;61(Pt 9):1263-72. Epub 2005, Aug 16. PMID:16131760<ref>PMID:16131760</ref>

 

</div>

<references/>

[[Category: Mueller-Dieckmann, C.]]

[[Category: Panjikar, S.]]

[[Category: Tucker, P A.]]

[[Category: Weiss, M S.]]

[[Category: Double helix]]