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 Results for by Main, P.
Preparation of input data
Cowtan, K. D., Zhang, K. Y. J. and Main, P., International Tables for Crystallography (2012). Vol. F, Section 15.3.3, pp. 407-408 [ doi:10.1107/97809553602060000849 ]
be provided. References Brünger, A. T. (1992). X-PLOR. Version 3.1. A system for X-ray crystallography and NMR. Yale University Press, New Haven. Google Scholar Cowtan, K. D. & Main, P. (1998 ...

Density-modification modes
Cowtan, K. D., Zhang, K. Y. J. and Main, P., International Tables for Crystallography (2012). Vol. F, Section 15.3.4.1, pp. 408-409 [ doi:10.1107/97809553602060000849 ]
modification technique and is powerful for improving phases at fixed resolution, but weaker at extending phases to higher resolution. Its phasing power is highly dependent on the solvent content. Solvent flattening can be applied at com­paratively low ...
     [more results from section 15.3.4 in volume F]

Scaling
Cowtan, K. D., Zhang, K. Y. J. and Main, P., International Tables for Crystallography (2012). Vol. F, Section 15.3.5.1, pp. 410-411 [ doi:10.1107/97809553602060000849 ]
it is important that this value be entered correctly. However, the volume of the solvent mask may be varied independently of the true solvent content, as discussed in Section 15.3.3 . References Cowtan, K. D. & Main, P. (1998 ...
     [more results from section 15.3.5 in volume F]

DM/DMMULTI software for phase improvement by density modification
Cowtan, K. D., Zhang, K. Y. J. and Main, P., International Tables for Crystallography (2012). Vol. F, ch. 15.3, pp. 407-412 [ doi:10.1107/97809553602060000849 ]
A 48, 301–312. Google Scholar Collaborative Computational Project, Number 4 (1994). The CCP4 suite: programs for protein crystallography . Acta Cryst. D 50, 760–763. Google Scholar Cowtan, K. D. & Main, P. (1996 ...

Program operation
Cowtan, K. D., Zhang, K. Y. J. and Main, P., International Tables for Crystallography (2012). Vol. F, Section 15.3.2, pp. 407-407 [ doi:10.1107/97809553602060000849 ]
These must include the reflection data and solvent content, and may also include averaging operators, solvent mask and averaging domain masks. (2) Select the appropriate density modifications and the phase-combination mode to be used ...

Introduction
Zhang, K. Y. J., Cowtan, K. D. and Main, P., International Tables for Crystallography (2012). Vol. F, Section 15.1.2.1.1, pp. 386-387 [ doi:10.1107/97809553602060000847 ]
content of protein crystals . J. Mol. Biol. 33, 491–497. Google Scholar Reynolds, R. A., Remington, S. J., Weaver, L. H., Fisher, R. G., Anderson, W. F., Ammon, H. L. & Matthews, B. W. (1985). Structure of a serine ...
     [more results from section 15.1.2 in volume F]

Example
Zhang, K. Y. J., Cowtan, K. D. and Main, P., International Tables for Crystallography (2012). Vol. F, Section 15.1.7, pp. 398-399 [ doi:10.1107/97809553602060000847 ]
881–882. Google Scholar Zhang, K. Y. J., Cowtan, K. D. & Main, P. (1997). Combining constraints for electron density modification. In Macromolecular Crystallography, edited by C. W. Carter & R. M. Sweet, Vol. 277, pp. 53–64. New ...

Phase improvement by iterative density modification
Zhang, K. Y. J., Cowtan, K. D. and Main, P., International Tables for Crystallography (2012). Vol. F, ch. 15.1, pp. 385-400 [ doi:10.1107/97809553602060000847 ]
and bias correction in phase-improvement calculations . Acta Cryst. D 55, 1555–1567. Google Scholar Cowtan, K. D. & Main, P. (1993). Improvement of macromolecular electron-density maps by the simultaneous application of real ...

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