peroxidase activity thus develops asynchronously in a given cell as well as in the secretory cell population as a whole 2 days after birth , all cisternae of the rough endoplasmic reticulum of a peroxidase-positive cell contain reaction product , but the majority of the acinar cells is still negative during the next days , the number of peroxidase-positive cells and the amount of the rough endoplasmic reticulum increase rapidly .
C1180016
cisternae of
C0007634
the