GLYCOLATE PATHWAY 



N. E. Tolbert 



During C^^02 photoS5mthesis , glycolate and its derivatives 

 become labeled. The sequence of reactions producing this pat- 

 tern of labeling is referred to here as the glycolate pathway 

 (1). These reactions are thought to be a metabolic process 

 which occurs after fixation of the CO2 by the photosynthetic 

 carbon cycle. The following formulation of this pathway and its 

 relation to other metabolic processes is based on information 

 in numerous publications since 1950. 



sugar- P 

 of PS 



1 



COOH 

 I ^ 



CH2O-© 



phospho- 

 glycolate 



phospha- 



tase 



COOH 

 CH2OH 



glycolate 



glyoxylate 

 cycle 



FMNH- 



NAD 

 NADP 



NADH 

 NADPH 



t^ 



COOH 

 I 



CHO 



glyoxy- 

 late 



COOH 

 I 



CHOH «- 

 CH2OH 



\ 



COOH 

 I 



CHOH 



CH2O-© 



COOH 

 I 



C=0 i 



I 



CH20H 



transam- 



inase 



COOH 



CHNH2 ^ 



CH2OH 



transam- 

 inase 



i 



COOH 

 I 



CH2NH2 



648 



