              Data items in the ATOM_SITE category record details about\
               the atom sites in a macromolecular crystal structure, such as\
               the positional coordinates, atomic displacement parameters,\
               magnetic moments and directions, and so on.\
\
               The data items for describing anisotropic temperature or atomic\
               displacement factors are only used if the corresponding items\
               are not given in the ATOM_SITE_ANISOTROP category.