% 







v^-; 



%.m/ 



'■■X-^ 



..r^m 





." :> 



r^ 



^ 





^-"^, 



•^ii^J- 



,^''<^;'. 



/ 



Ji 



^-' 



'^ ' -.3 





PLATE XII. Endoplasmic reticulum in a kidney epithelial cell (rat glomerulus) showing a cisterno 

 distended at one end to form a large vacuole probably containing newly synthesized protein (x). 

 Ribosomes (r) are seen on the membranes and in the cytoplasmic matrix. The nucleus (n) and two 

 "polka dot bodies" (p) (multivesicular bodies), concerned with transport into the cell, are also present. 

 60,000 X- (Courtesy of M. G. Farquhar and G. E. Palade.) 



