Multiple Molecular Forms of y-GIutamyl Transpeptidase during Human Pregnancy

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Abstract
During human pregnancy an increase was found in total serum y-glutamyl transpeptidase (y-GT). The enzyme has been fractionated into five fractions by polyacrylamide electrophoresis. Four of the five isoenzymes detected in pregnancy serum were increased, none of which were found to originate in the placenta. Intestine and bone extracts were found to contain two fractions with different electrophoretic mobilities. Four zones were detected in pancreas and kidney extracts and five zones in normal and pregnancy serum. The enzyme fractions differed in molecular form and in their action with L-methionine, urea and Triton-X-100.

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