Published online by Cambridge University Press: 09 March 2007
1. Zinc deficiency was produced experimentally in guinea-pigs fed on a diet containing 1.25 mg Zn/kg diet over a period of 60 d. In addition, the response of the Zn-deficient (ZnD) animals to Zn supplementation was studied for 15 d.
2. In the ZnD group a significant reduction was found in serum Zn and protein concentrations and in alkaline phosphatase (EC 3. 1. 3. 1; AP) activity from day 24 onwards.
3. Paper electrophoretic studies on serum revealed a significant decrease in relative values, as well as absolute values, of albumin and γ-globulin and an increase in β-globulin.
4. Albumin:globulin increased on day 24 but decreased significantly from day 48 onwards.
5. The kidney and testis of the ZnD group showed a reduction in Zn and protein contents, and AP activity.
6. Zn supplementation of the previously ZnD group resulted in marked although incomplete improvement in the biochemical indices studied.