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Clinical Chemistry, Vol 27, 48-51, Copyright © 1981 by American Association for Clinical Chemistry
JA Knight and RE Haymond
We compared alkaline phosphatase (EC 3.1.3.1) and gamma- glutamyltransferase (EC 2.3.2.2) activities in sera from children with various hepatic diseases with values for normal children. Although values for both enzymes are above normal in essentially the same liver disorders, the latter is much more specific and sensitive. A single value for alkaline phosphatase, measured at any time during childhood or at any stage of liver disease, is extremely difficult to interpret. We suggest that measurement of gamma-glutamyltransferase routinely replace alkaline phosphatase as a screening test and in following patients with obstructive or infiltrative hepatic disorders. We give reliable reference intervals for gamma-glutamyltransferase covering the entire pediatric age group.
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