on the day after birth , alkaline phosphatase activity , as shown by the azo-coupling method was found on the microvilli and the tubulovacuolar system in the proximal part of the large intestine between the 1st and the 15th days , enzyme activity was localized on the microvilli , the tubulovacuolar system , and the supranuclear vacuole of the surface principal cells of the cecum and the ascending colon .
C0026049
microvilli
C0007634
cells