Evans P R
MRC Laboratory of Molecular Biology, Hills Road, Cambridge CB2 2QH, England.
Acta Crystallogr D Biol Crystallogr. 2001 Oct;57(Pt 10):1355-9. doi: 10.1107/s0907444901012410. Epub 2001 Sep 21.
In molecular replacement, a model, described as a list of orthogonal coordinates, is to be moved into a new position and orientation. The orthogonal coordinate system also has to be related to the crystallographic system, which may not be orthogonal, and crystallographic symmetry must be considered, which applies to coordinates expressed as fractions of the unit cell. Elementary properties of rotation matrices and their representation as polar or Eulerian angles are discussed.
在分子置换中，一个以正交坐标列表描述的模型需要被移动到一个新的位置和方向。正交坐标系还必须与晶体学系统相关联，晶体学系统可能不是正交的，并且必须考虑晶体学对称性，这适用于表示为单位晶胞分数的坐标。文中讨论了旋转矩阵的基本性质及其以极角或欧拉角表示的形式。
