26 BIOLOGICAL CHEMISTRY 



This brief outline of the nature of chemical substances 

 obtained from cells covers the greater number of substances 

 found in living structures. 



In closing this chapter it is important to emphasise the 

 fact that the living cell requires a supply of available energy 

 and that this supply is obtained from organic compounds. 

 Whatever may be the functions of the various groups of sub- 

 stances described above they are all capable of furnishing a 

 supply of energy. This energy supply and the relations of 

 these groups of compounds to each other will be considered 

 in later chapters. 



For fuller information on the subjects of this chapter see Monographs on 

 Bio- chemistry (Longmans, Green & Co.). 



E. F. ARMSTRONG : The Simple Carbohydrates and the Glucosidcs. 

 J. B. LEATHES : The Fats. 

 H. MACLEAN : The Lipins. 

 T. B. OSBORNE : The Vegetable Proteins. 

 R. H. A. PLIMMER : The Chemical Constitution of the Proteins. Parts I 



and II. 

 S. B. SCHRYVER : The General Characters of the Proteins. 



