CONTENTS 



General Introduction iii 



Preface vii 



Section A: Characterization, Distribution, Assay and Biogenesis of 

 B Vitamins 



B Vitamins: What They Are 3 



Distribution of B Vitamins 18 



Combined Forms — Extraction 30 



Assay Methods 45 



Biogenesis of the B Vitamins 78 



Section B: The Catalytic Functions of the B Vitamins 



Chapter IB : Biochemical Reactions and Their Catalysts 95 

 Chapter IIB: Coenzymes Derived from B Vitamins 123 



Chapter IIIB : The Functions of the B Vitamins in Meta- 

 bolic Processes 216 



Section C: The Role of the B Vitamins in Animal and Plant 

 Organisms 



Chapter IC: Methods of Assessing B Vitamin Require- 

 ments 243 



Chapter IIC: Factors Influencing B Vitamin Require- 

 ments 264 



Chapter IIIC: The B Vitamin Requirements of Animals 



and Plants 306 



Chapter IVC: Metabolism of the B Vitamins 336 



Chapter VC: Physiological, Pharmacological, and Tox- 



icological Effects 377 



Chapter VIC: B Vitamin Deficiency States 395 



Section D: The Comparative Biological Activities of the B Vitamins 

 and Related Compounds 



Chapter ID: Introduction and Theoretical Considera- 

 tions 443 

 ix 





