Choline acetyltransferase activity in rat salivary glands enlarged by isoprenaline treatment.

Certain procedures have earlier been found to cause the weight of the rat parotid gland to vary. After these procedures the choline acetyltransferase activity in the gland was also found to have changed in the same direction as the weight. This might suggest that variations in the gland mass in itself could influence the choline acetyltransferase activity. However, the present study shows that this does not seem to be the case, since a marked enlargement of the parotid gland, induced by isoprenaline treatment, can occur without being accompanied by any increase in the activity of this enzyme.