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首页> 外文期刊>Acta crystallographica.Section D. Biological crystallography >Estimation of anomalous signal in diffraction data
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Estimation of anomalous signal in diffraction data

机译:在衍射数据估计的异常信号

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It is difficult to judge objectively the amount and resolution limit of the anomalous signal present in diffraction data. While several criteria can be used for this purpose, the usefulness of these indicators varies and depends on factors such as the data redundancy, the accuracy of the estimation of intensities and their uncertainties, and the properties of the anomalously scattering atoms in the crystal. Various indicators give an approximate measure of the anomalous signal, but do not provide a reliable guarantee that the crystal structure will be solved. The ultimate criterion of the anomalous signal is a successful structure solution. The current data-acquisition and phasing methods are so advanced that it is often possible to phase reflections and obtain preliminary electron-density maps in a few minutes, while the crystal still resides at the experimental station and further data can be collected if necessary
机译:很难判断客观量和分辨率极限的异常信号在衍射数据。标准可以用于此目的这些指标的有效性不同,视情况而定在数据冗余等因素,估计的强度和精度他们的不确定性,和的性质反常地散射原子晶体。各种指标给出一个近似的异常信号,但不提供可靠的保证晶体结构将会解决。是一个成功的结构异常信号解决方案。分阶段方法先进,通常可能相反射和获得初步的电子密度在几个地图分钟,而水晶仍然居住在试验站,并进一步数据可以如果有必要收集

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