Fig. 2. Periphery of the Gol^i zone (centrosphere region) in acinar cell of 

 pancreas, er = endoi)lasmic reticulum (ER); gm = granular membranes of 

 the ER having ribonucleoprotein particles; am = agranular membranes of 

 the ER having no particles and in continuity with the granular membranes 

 at this point; G = Golgi region showing stacks and swarms of bare mem- 

 branes ; g = intracisternal granule inside cisterna of the ER ; Z = zymogen 



granule. 

 Magnification = 43,333, (Kindly loaned by G. E. Palade, unpubhshed.) 



