CONTENTS OF PART I, 



PAGE 



INTRODUCTION - - - - x 



SECTION 



I. THE CHEMICAL COMPOSITION OF THE PROTEIN MOLECULE - 5 



I. The Monoamino Acids - 6 



II. The Diamino Acids - 15 



II. THE CHEMICAL CONSTITUTION OF ITS UNITS, OR THE DISCOVERY 



AND SYNTHESES OF THE AMINO ACIDS - - 28 



A. Monoamino-monocarboxylic Acids - 28 



Glycine - - 28 



Alanine - ~ 3 



Valine - 32 



Leucine - ~ ~ 33 



Isoleucine - '35 



Phenylalanine - 37 



Tyros ine - -41 



Serine - - - - 44 



Cyst ine - 45 



B. Monoaminodicarboxylic Acids - 51 



Aspartic Acid - -51 



Glutamic Acid - - 53 



