PHOTOSYNTHETIC PHOSPHORYLATION AND THE ENERGY CONVERSION PROCESS 343 



/ 



Fig. 2. Electron micrograph of a section of a maize chloroplast showing 

 details of structure. The dense areas that resemble stacks of coins are the grana. 

 The layers within each granum are called grana lamellae. The grana lamellae of 

 different grana are inter-connected by stroma lamellae. Magnification 35 000 x 

 (courtesy of Dr. A. E. Vatter). 



chloroplasts [38, 39] in the dark, it was converted to sugar phosphates. The 

 hght and dark phases when carried out separately, yielded essentially the 

 same final photosynthetic products as the continuously illuminated 

 chloroplast system. The products included hexose and pentose mono- and 

 diphosphates, phosphoglyceric acid, dihydroxyacetone phosphate, and 

 small amounts of phosphoenolpyruvate and malate [37]. 



