THE CHEMOTROPHIC ASSIMILATION OF CARBON 67 



Under the conditions of carbohydrate deficiency usually 

 used in experimental studies of oxidative assimilation the 

 products formed by Chlorella and Scenedesmus are chiefly 

 polysaccharides, the exact nature of which has not been 

 established. 2^^' ^si Xhese products may subsequently be 

 broken down to provide for the synthesis of other cell 

 materials. 22 Under other circumstances oxidative assimila- 

 tion presumably results directly in the production of 

 lipides or proteins. 



