Six elements in several organs of mice fed with Zn deficient diet (Zn-def. mice) and those fed with control diet (control
mice) were analyzed by INAA. Zinc concentrations in the organs of Zn-def. mice were not distinctly lower than those of control
mice except for bone and pancreas. However, Ce content increased significantly in all organs of Zn-def. mice compared with
control mice, indicating the partial substitution of Co with Zn in metal proteins or other materials for the Zn-def. mice.