The Locked Translation Function and Other Applications of a Patterson Correlation Function

Another form of the Patterson correlation function is presented. It is based on the overlap of the self vectors throughout the entire unit cell. The dependence of this overlap on the position of a monomer (of known orientation) relative to the center of a non-crystallographic assembly leads to the definition of a locked translation function. This overlap is also dependent on the orientation of a search atomic model and therefore can be applied to the refinement of rotational parameters. Other possible applications of this correlation function are also discussed.