in response to retinoic acid treatment , the levels of cyclic amp ( camp ) -dependent protein kinases are enhanced in the plasma membrane within 17 hours and in the cytosol fractions of these cells within 2 to 3 days , as determined by phosphotransferase activity and by 8-azido-cyclic [ 32p ] amp binding to the ri and rii regulatory subunits .
C0007603
plasma
C0007634
cells