

Phosphoglucomutase 



Glycogen 



l N 

 i i 



>l I 



(Glucose-l-phosphate) -^r 



Hexokinase 

 .■■ ■■». 



ATP 



I 



^ I 



ADP 



Glucose phosphate 

 dehydrogenase 



(Glucose) 



TPN" 



(Glucose-6-phosphate) 



Hexoseisomerase 



I 



\ 



M 



(Fructose-6 -phosphate) 



TPNH 

 ^ Pentose 



> (6-Phosphogluconate) 



->TPNH 



TPN 



Phosphogluconic 

 dehydrogenase 



4- 



Phosphofructokinase 



I 



Fructose-1, 6-diphosphatase 



(Fructose-1 , 6 -diphosphate) 



Aldolase 



Dihydroxyacetonephosphate 



(Glyceraldehyde-3-phosphate) «^ ••■ 



w 



N I 



(1 , 3-Diphosphoglycerate) 



Jr 



3-phosphoglycerate) 



\ 



Enolase . i 



Phosphoenolpyruvate 

 \\ 



Aerobic conditions 

 DPN + stimulated 



/ 



Glycogen 

 Glucose 

 Fructose 



Glucose - 1-phosphate 

 Fructose-6 -phosphate 

 Fructose-1, 6- 

 diphosphate 



Glucose-6 -phosphate \__^- Pyruvate _ ~-T~ Lactate 

 Hexosediphosphate J 



(TCA cycle) 



Figure 4. Known intermediary metabolism of carbohydrates in 

 the sea urchin. 



