HEME PROTEINS 69 



tion of oxidase activity in dark-grown aerobic R. rubrum cultures (7, 

 28) which show very good correlations between such spectra and the CO, 

 reduced-minus- reduced difference spectra of cytochromoidI,butthese 

 apparently only prove the identity of these spectra for "cytochrome o" 

 and cytochromoid I. 



CONCLUDING REMARKS 



I have not burdened you with many data in this presentation because 

 it is certain that neither space nor time allotted permitted a detailed 

 discourse, and because I feared the general outlines which have 

 emerged in this area of research might not be visible through the flood 

 of tables and figures which would have resulted from any attempt to 

 document my remarks. I have included references which I hope will 

 aid those of you who wish to inquire further into the subject matter I 

 have presented. 



REFERENCES 



1. Elsden, S. R., Kamen, M. D., and Vernon, L. P., A new soluble cyto- 

 chrome. J.Am. Chem. Soc, 75, 6347 (1953). 



2. Vernon, L. P., and Kamen, M. D., Hematin compounds in photosynthetic 

 bacteria. J. Biol. Chew., 211, 643 (1954). 



3. For reviews of structure and function of heme proteins, the following arti- 

 cles by the author may be consulted: 



(a) New problems in the biochemistry and metabolism of heme proteins, 

 p. 245 in Proc. Inter)}. Syiiip. on Enzyme Chemistry, Toliyo and 

 Kyoto. 1957 {K. Ichihara, ed.), Vol. 2. Maruzen, Tokyo, 1958. 



(b) Hematin compounds in photos joithesis. p. 323 in Comparative Bio- 

 cliemistry of Pholoreaetive Systems (M. B. Allen, ed.). Academic 

 Press, New York, 1960. 



(c) Comments on function of haem proteins as related to primary photo- 

 chemical processes in photosynthesis, p. 483 in A Symposium on 

 Liglit and Life (W. D. McElroy and B. Glass, eds.). Johns Hopkins 

 Press, Baltimore, 1961. 



(d) Cytochrome systems in anaerobic electron transport (with J. W. 

 Newton), p. 397 in Tlie Bacteria (I. C. Gunsalus and R. Y. Stanier, 

 eds.). Vol. 2. Academic Press, New York, 1961. 



(e) The atj^Dical haemoprotein of purple photosynthetic bacteria (with 

 R. G. Bartsch). p. 419 in Haematin Enzymes (J. E. Falk, R. Lemberg, 

 and R. K. Morton, eds.). Part 2. Pergamon Press, New York, 1961. 



(f ) Haem protein content and function in relation to structure and early 

 photochemical processes in bacterial chromatophores. p. 277 in 

 Biologieal Structure and Function (T. W. Goodwin and O. Lindberg, 

 eds.), Vol. 2. Academic Press, New York, 1961. 



4. Lemberg, R., Clezy, P., and Barrett, J., Haem A2 and chlorin A2. p. 354 in 

 Haematin Enzy)}ies (J. E. Falk, R. Lemberg, and R. K. Morton, eds.), Part 1. 

 Pergamon Press, New York, 1961. 



