viii CONTENTS 



PAGE 



Irreversible Inhibition of Catalase by the 3-Amino-l:2:4-Triazole 

 Group of Inhibitors in the Presence of Catalase Donors 

 by E. Margoliash and A. Schejter 236 



Catalase Oxidation Mechanisms 



by M. E. WiNFiELD 245 



Discussion 



Oxidation States of Haemoproteins ...... 252 



Peroxide Compounds of Catalase and Peroxidase .... 254 



The Nature of Catalase-Peroxide Complex I 



by B. Chance 254 



Studies on Problems of Cytochrome c Oxidase Assay 



by LuciLE Smith and Helen Conrad 260 



Discussion 



Assay of Cytochrome c Oxidase ....... 275 



Inhibition of Cytochrome c Oxidase by Cytochrome c . . . . 275 



Interaction of Cytochrome c with Other Compounds . . . . 276 



The Effect of Cations on the Reactivity of Cytochrome c in Heart Muscle 

 Preparations 

 by R. W. Estabrook 276 



Composition of Cytochrome c Oxidase 



by W. W. Wainio 281 



Discussion 



Function of Copper in Cytochrome Oxidase Preparations . . .301 



Cytochrome Oxidases of Pseudomonas aeruginosa and Ox-Heart 

 Muscle and Their Related Respiratory Components 



by T. HoRio, I. Sekuzu, T. Higashi and K. Okunuki . . . 302 



DisciLssion 



Properties and Nomenclature of Cytochromes di and z^ . . .311 



The Prosthetic Groups of Pseudomonas Cytochrome Oxidase 



by T. Horio and M. D. Kamen 314 



The Reaction of Cytochrome c Oxidase with Oxygen . . . .316 



The Oxygen-Reducing Equivalents of Cytochromes a and 03 



B. Chance .......... 316 



