2o8 ORGANIC AGRICULTURAL CHEMISTRY 



We have just demonstrated that proteins can be converted into 

 carbohydrates, and the conversion of carbohydrates into fats is 

 Ukewise proved. 



Thus protein food may yield both carbohydrates and fats 

 from the non-nitrogenous portion of the molecule, and this por- 

 tion, whether it is thus transformed or not, is eventually oxidized 

 with the liberation of energy. This energy, however, is not 

 equal to the entire energy of the original protein molecule, as a 

 portion of it remains locked up, with the nitrogen portion of the 

 protein, in the form of urea and other nitrogen excretion products 

 of protein katabolism. 



