Statistics on data collection and structure refinement.

aValues in parentheses are for the data in the highest resolution shell.bRmerge = ∑|Ii−Im|/∑Ii, where Ii is the intensity of the measured reflection and Im is the mean intensity of all symmetry related reflections.cRwork = ∑|Fo−Fc|/∑Fo, where Fo and Fc are the observed and calculated structure factor amplitudes.dRfree is the same as Rwork, but calculated on 5% reflections not used in refinement.eAnalyzed by RAMPAGE [34].a. 括号内数值对应最高分辨率壳层的数据。 b. 合并R因子（Rmerge）= ∑|Ii−Im|/∑Ii，其中Ii为实测衍射点的强度，Im为所有对称相关衍射点的平均强度。 c. 工作R因子（Rwork）= ∑|Fo−Fc|/∑Fo，其中Fo与Fc分别为观测得到与计算得到的结构因子振幅。 d. 自由R因子（Rfree）的计算逻辑与工作R因子一致，但仅针对结构精修过程中未纳入使用的5%衍射点进行计算。 e. 本数据集经由RAMPAGE工具[34]分析。