xii CONTENTS OF PART I. 



PAGE 



The Results of the Analysis A - - 40 



> B - 44 



Protamines - - 44 



Histones - -45 



Albumins and Globulins - - 45 



The Vegetable Proteins - - - 46 



Phosphoproteins - 48 



The Scleroproteins - - 49 



Conjugated and other Proteins - - 50 



Derivatives of Proteins - 52 



Differentiation of the Proteins by the Distribution of the 



Various Kinds of Nitrogen - .53 



A. Distribution of the Nitrogen in Three Groups - - 64 



B. Distribution of the Nitrogen in Seven Groups - - 67 



I. Estimation of Amino Nitrogen - - 69 



II. Estimation of the Different Groups of Amino Acids 74 



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



AND SYNTHESES OF THE AMINO ACIDS - - - 82 



A. Monoaminomonocarboxylic Acids - 82 



Glycine - - 82 



Alanine - - 85 



Valine - 87 



Leucine - - 88 



Isoleucine - 91 



Phenylalanine - 93 



Tyrosine - - 98 



Serine - - 102 



Cystine - 104 



The Sulphur in Proteins - -no 



B. Monoaminodicarboxylic Acids - - 112 



Aspartic Acid - -112 



Glutamic Acid - 114 



C. Diaminomonocarboxylic Acids - -117 



Arginine - . - 120 



Lysine - - 123 



D. Heterocyclic Compounds - 125 



Histidine - - - -125 



Proline - - -130 



Oxyproline > - 132 



Tryptophane - - 134 



E. The Optically Active Amino Acids - 139 



1. Separation of Racemic Mixture - 139 



2. The Walden Inversion - - 143 



3. The Correlation of the Configurations of the Amino 



Acids ... . 147 



BIBLIOGRAPHY - - 150 



INDEX - - * - 183 



