81 



Brltton Chance and Walter D. Bonner, Jr. 



FOOTNOTE 



In the verbal presentation of this paper, it was noted that the 

 ahsorbancy decrease at 705 m^ reverted tovards the baseline after 

 cessation of actinic illumination. The experiments have been re- 

 peated, but the results are irregular. Since the main conclusions 

 on the relationship of cytochrome f and T^qq do not depend upon 

 this observation, this paper reports only observations \inder 

 conditions in which the absorbancy change due to illumination at 

 low temperatures is apparently stable. 



ACKNOWLEDGMENTS 



The technical assistance of Brigitte Schoener is gratefully 

 acknowledged. 



This research is supported by the National Science Foundation 

 and the national Institute of Health. 



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