47 

 (195 and 198 mg/kg, respectively) than the control treatment 

 (127 mg/kg) . Mean Zn content of bone, bone marrow, cornea, 

 skin, hoof and muscle was not different (P > .05) among 

 treatments. The ZnLys treatment had the highest (P < .05) MT 

 levels of 79, 167, and 68 (ig MT/g for liver, kidney, and 

 pancreas, respectively. Mean muscle Cu concentration was 

 highest (P < .05) for controls (10 mg/kg) . Organic sources of 

 Zn have equal or greater availability than the most available 

 inorganic source and may be metabolized differently in some 

 tissues . 



