THE PRODUCTS OF METABOLISM 

 TABLE 7 



99 



FATTY ACIDS, EXPRESSED AS PERCENTAGES BY WEIGHT OF TOTAL 

 FATTY ACIDS, OF ALGAE REPRESENTATIVE OF VARIOUS CLASSES AND 



OF A HIGHER PLANT 



Degrees of unsaturation are given in parenthesis 



there would otherwise appear to be no difference between 

 the fats of marine and freshw^ater algae. ^'^^ 



In addition to fats, a fat solvent extract of any organism 

 contains lesser amounts of other materials, such as photo- 

 synthetic pigments, sterols and hydrocarbons, which are 

 unrelated chemically to the true lipides and which are 

 generally classed as lipoids. Of these, the photosynthetic 

 pigments have already been discussed in an earlier chapter. 



