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Likelihood-enhanced fast translation functions

机译:Likelihood-enhanced快速翻译功能

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摘要

This paper is a companion to a recent paper on fast rotation functions [Storoni et al. (2004), Acta Cryst. D60, 432-438], which showed how a Taylor-series expansion of the maximum-likelihood rotation function leads to improved likelihood-enhanced fast rotation functions. In a similar manner, it is shown here how linear and quadratic Taylor-series expansions and least-squares approximations of the maximum-likelihood translation function lead to likelihood-enhanced translation functions, which can be calculated by FFT and which are more sensitive to the correct translation than the traditional correlation-coefficient fast translation function. These likelihood-enhanced translation targets for molecular-replacement searches have been implemented in the program Phaser using the Computational Crystallography Toolbox (cctbx).
机译:本文是一个同伴上最近的一篇论文快速旋转功能[Storoni et al . (2004)Acta结晶。最大似然之扩张旋转功能导致改善likelihood-enhanced快速旋转的功能。类似的方式,这里显示的是线性的和二次之扩张和最小二乘近似的最大似然函数导致的翻译likelihood-enhanced翻译功能可以通过FFT计算,哪些是更多正确的翻译比敏感传统的相关系数快速翻译功能。翻译的目标molecular-replacement搜索已在程序中实现移相器使用计算晶体学工具箱(cctbx)。

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