the percentage of grains associated with the sparsely granulated endoplasmic reticulum suggests that much of the synthesis of secretory protein in the principal cells occurs in this organelle , and the lack of alteration of its labeling in the presence of a monensin-induced block at the level of the golgi apparatus indicates that the sparsely granulated endoplasmic reticulum lies before the golgi apparatus in the secretory pathway .
C0007634
cells
C0014239
endoplasmic reticulum