CONTENTS Xlll 



PAGE 



Studies on Microsomal Cytochromes and Related Substances 



by C. F. SlRlTTMATTER 461 



Discussion 

 On the Nature of Cytoplasmic Pigments of Liver Cells 

 by B. Chance 473 



Possible Functions of the Cytochromes of the Endoplasmic Reticuhun of 



Animal Cells 476 



The Significance of Eq Values of Cytochromes in Relation to Cellular 



Function ......... 477 



The Cytochromes of Plant Tissues 



by W. D. Bonner, Jr . . .479 



Discussion 

 Cytochromes Ci and 63 of Particulate Components of Plants 



by R. K. Morton 498 



The Cytochromes of Roots ....... 499 



The Chemical and Enzymic Properties of Cytochrome Z^g of Bakers' 

 Yeast 

 by R. K. Morton, J. McD. Armstrong and C. A. Appleby . 501 



Conditions for the Autoxidation of Flavocytochrome Z>2 



by E. Boeri and M. Rippa 524 



Kinetic Studies on the Action of Yeast Lactate Dehydrogenase 



by H. Hasegawa and Y. Ogura 534 



Various Forms of Yeast Lactate Dehydrogenase 



by A. P. Nygaard 544 



Studies on Bakers' Yeast Lactate Dehydrogenase 



by T. Horio, J. Yamashita, T. Yamanaka, M. Nozaki and 

 K. Okunuki 552 



Discussion 



The Problem of Cytochrome bg . ...... 558 



Properties of Intact and Modified Cytochrome h.^ .... 560 



