ENERGY SUPPLY OF THE CELL 49 



CH3-C00H + 2H = Acceptor 



Acetic acid 



^OH .OH 



IIIc. CHs-CO-COH = CHsCO-CO— H = 



\h \h 



CH3-C0-C00H + 2H = Acceptor 

 (same as reaction Ic.) 



IV. HYDROGENATIONS 



IVa. 2H = H2 



Hydrogen gas 



IVb. 2H + O = H2O 



IVc. CH20H-CH0H-CH0 + 2H = CH20H-CH0H- 



Glyceric aldehyde Glycerol f^TT OTT 



IVd. CHg-CHOHCOOH + 2H = CH3-CH2-COOH 



Lactic acid Propionic acid 



IVe. CHa-CHO + 2H = CH3CH2OH 



Acet aldehyde Ethyl alcohol 



IVf. CHa-COCHOH-CHs + 2H = CHa'CHOH- 



Acetyl methyl carbinol OTTOTT«r^TT 



2, 3, Butylene glycol 



IVg. CH3CH2-CH2-COOH + 4H = CH3-CH2-CH2- 



Butyric acid OTT OTT 



Butyl alcohol 



IVh. CeHnOe + 2H = CsHuOe 



Fructose Mannitol 



IV. etc. 



(/) TYPES OF FERMENTATION 



The alcoholic fermentation starts from glucose-phos- 

 phate over glyceric aldehyde to methyl glyoxal as out- 

 lined above. The next step is equation IIIc and IVe 



