Electronic Resource
Copenhagen
:
International Union of Crystallography (IUCr)
Acta crystallographica
51 (1995), S. 853-855
ISSN:
1399-0047
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics
Notes:
A simple modification to the fast T1 translation function of Crowther & Blow [Crowther & Blow (1967). Acta Cryst. 23, 544–548] can reduce systematic error in cases where the input set of oriented search models represents a fraction of the scattering matter of the unknown crystal unit cell. The observed Patterson function is modified by a partial self-vector subtraction (SVS) and then the residual Patterson origin is removed. In a test case where a protein/DNA complex crystal was searched using a protein-only model, the highest signal- to-noise ratios for translation-search maps were obtained either with origin removal alone or partial SVS combined with origin removal. Origin removal is likely to be a generally useful alternative to SVS for the function.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S0907444995002265
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