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首页> 外文期刊>Acta crystallographica.Section D. Biological crystallography >On the application of phase relationships to complex structures. XXXVI: some experiments with a small protein without heavy atoms.
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On the application of phase relationships to complex structures. XXXVI: some experiments with a small protein without heavy atoms.

机译：在相位关系的应用复杂的结构。没有重原子小蛋白质。

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The direct-methods program MULTAN88 has been applied to a known protein, ribonuclease (RNAP1), containing 808 non-H atoms, including five S atoms, plus 83 ordered solvent water molecules. Phase sets with mean phase errors between 69 and 75 degrees were selected by modified figures of merit for trials with the full data at 1.17 A resolution and also with restricted data at 1.25 and 1.5 A resolution. These figures of merit had previously only been applied to protein structures containing heavy atoms, and this is the first demonstration of their usefulness with no heavy atom present. An initial set of 1091 phases from a 1.17 A trial was developed by an objective procedure to give the full structure with a residual of 0. 21, which agrees well with the published structure.
机译：直接方法程序MULTAN88应用于一个已知的蛋白质、核糖核酸酶(RNAP1),包含808个non-H原子,其中包括五个年代原子,+ 83命令溶剂水分子。在69年和相集意味着阶段错误75度被修改的数据选择1.17绩效与完整的试验数据分辨率和限制数据为1.25和1.5一项决议。以前只应用于蛋白质包含重原子结构,这是第一个示范的作用没有沉重的原子。1.17阶段的试验是由一个目标程序让完整的结构剩余的0。发布的结构。

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