Fig. 9. Intracisternal granules in the basal icoion of an acinar cell of guinea 

 pig pancreas, g = intracisternal granules inside vesicles of the ER. These 

 vesicles are bounded bv membranes having attached ribonucleoprotein 



particles (RNp). Cf. Fig. 2. 



Magnification = 26,666. (Palade and Siekevitz, 1956&. Reproduced by 



permission of the Editors, J. biophijs. biochem. Cytol.) 



