Amount and Distribution of Amylophosphorylase in Uterus of the Rat.

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Abstract
Amylophosphorylase activity of the uterus was determined both quantitatively and histochemically in castrate rats and rats treated with estrogen and/or progesterone. There was no significant difference in enzyme activity between any of the groups of animals regardless of treatment. Moderate to strong activity was uniformly present throughout the myometrium, whereas in the endometrium there was but irregular and weak activity in the lining epithelium. These observations demonstrate that the distribution of phosphorylase in the rat uterus is the same as that of glycogen. Unlike glycogen, however, the enzyme activity is not changed by treatment with steroid sex hormones.