146 



Ellen C. Weaver and Norman I. Bishop 



tn 

 < 

 111 

 (£ 

 O 



Fig. 8 Absorption change in hydrogen adapted wild type 



Scenedesitius with 0,1 mg NaHCO-3 in 10 ml of cell suspension 

 and 10-5 M DCMU. The time course is similar to that of the "O2" 

 mutant^ No. 11. The physiological "behavior of these two prepara- 

 tions has been shown to he similar^). 



Acknowledgments ; ¥e thank Prof. Melvin Calvin, in whose labora- 

 tory a part of this work was done, and Mr. Irwin Kuntz, Jr., who 

 designed and "built the difference spectrophotometer. He was an 

 active participant in the experiments. 



Parts of this investigation were supported "by National Science 

 Foundation Grant GB 97^, contract No. AT( ^0-1 ) -2687 between the 

 United States Atomic Energy Commission and the Florida State 

 University, and the Fels Fund. 



LITERATURE CITED 



(1) E. C. Weaver and H. E, Weaver, Photochem. and Photoblol . 

 2, 325 (1963) 



(2) G. M. Androes, M. F. Singleton and M. Calvin, Proc . Natl . 

 Acad. Scl., U. S . ^8, 1022 (1962) 



(3) E. C. Weaver, Arch. Biochem. Biophys . 99, 193 (1962) 

 {\) E. C. Weaver and N. I. Bishop, Science ll+O, 1095 (1963) 



(5) Warren Butler, Personal Communication 



(6) B. Kok, Plant Physiology 3^1-, l84 (1959) 



(7) I. D. Kuntz, Jr., P. Loach, and M. Calvin. Submitted to 

 Biochem J . 



(8) Kok, B., Nature 179, 583 (l957) 



(9) N. I. Bishop, Nature 195, 55 (1962) 



