Abstract

Zinc deficiency is associated with poor growth and development. It has been postulated that a deficiency of the various zinc metalloenzymes results from the lack of dietary zinc. From present study, an examination of some aspects of this postulate, we conclude the following about zinc deficiency in pigs: (1) Of the tissues studied, it results im diminished zinc content only in liver, kidney, and pancreas. (2) It is associated with tissue abnormalities of various trace elements other than zinc. (3) Histochemical enzyme assays are satisfactory for qualitative but not quantitative determination of zinc metalloenzymes. (4) Deficiency of various tissue zinc metalloenzymes is difficult to demonstrate, even in severe zinc deficiency. (5) It is associated with decreased activity of hepatic leucine aminopeptidase and ornithine transcarbamylase, and decreased serum cholesterol concentrations. Our findings are consistent with the postulate that alterations in a number of trace elements may occur in the entity called zinc deficiency.

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