抄録
In order to verify the impurity depletion zone hypothesis, we developed a new method, which employs  a confocal  laser scanning microscope for detecting  fluorescence  of  the  labeled  impurity.  This  method  is  capable  of  visualizing  the  impurity distribution both inside and surroundings of the crystal.  We  visualized  both  the  impurity  depletion  zone  around  the growing protein crystal, and also the impurity distribution inside the crystal.  The  impurity  distribution  inside  the  crystal revealed that the impurity distribution coefficient in this experiment condition was about .