KINETIC STUDIES 



1681 



LIGHT 



DARK 1 2 



TIME (min.) OF EXPOSURE TO C'*0, 



LIGHT I 2 

 10 



Fig. 36.23. Change in radioactivity of several compounds with time during 

 photosynthesis and afterwards (after Calvin and Massini 1952). Note steady 

 increase in darkness of tagged glutamic acid, appearance of tagged citric acid, and 

 decline in tagged malic acid. 



60sL 



60sL-60sO 



l20sL 



GLUTAMIC 

 ACID 



CITRIC 

 ACID 



327 



373 



ALANINE 



526 



SUCROSE 



Fig. 36.24. Effect of 1 min. strong light, 1 min. dark sequence on 

 amounts of tagged glutamic acid, citric acid, alanine, and sucrose in Chlorella 

 (after Calvin and Massini 1952). 



