PREFACE VU 



In the five years between the appearance of the first and the present 

 edition of Immuno-Catalysis the intimate relationships between 

 biocatalysis and innumerable phenomena in the medical sciences 

 have become even more clearly apparent. The subject is maturing. 

 The author's treatment of the subject of Immuno-Catalysis has like- 

 wise matured. It is our sincere belief that the present volume will 

 prove stimulating and helpful to the many biochemically trained 

 investigators and teachers who are reinvigorating the medical sciences. 



Stuart Mudd, M.D. 

 Vhiladel'jphia 



