210 



AYAEROJUC METABOLISM 



TABLE 24 



Production of Acetic and Succinic Acids by Tctrahymena gelei, 

 (According to Thomas, 1942). 



VA CeHisOe (Glucose) 



i 



3 CsHeOs (Triose) 



-6H I 



i 



3 CH3.CO.COOH (Pyruvic avid) 



CH3.CO.COOH 

 +H2O 

 2H i 



2 CH3.CO.COOH 



+2 CO2 



(One mole of CO. 

 from medium, the 



CH3.COOH (Acetic acid) +CO2 other from re- 

 action at the left) 



2 COOH.CO.CH2.COOH 



(Oxalo-acetic acid) 



+4H 



1 



2 COOH.CHOH.CH2.COOH 

 (Malic acid) 



-2H2O 



2 C00H.(CH)2.C00H 

 (Fumaric acid) 



+4H 



2 COOH.(CH2)2.COOH 

 (Succinic acid) 



The above scheme results in the production of one mole of acetic 

 acid, the uptake of one mole of carbon dioxide from the medium, and 

 the formation of two moles of succinic acid. 



