526 



Eljl Fujimori and Kenneth Quinlan 



In summary, additional evidence is presented for the presence of 

 different types of chromophore in the phycobilins. The longest wave- 

 length chromophore of the phycobilins interacts with sulfhydryl groups of 

 protein. It was shown that the longest wave-length chromophore is cap- 

 able of receiving energy from the shorter wave-length chromophores, 

 acting as a bridge in transferring the energy to chlorophyll. When the 

 longest wave-length chromophore is inactivated by PCMB, the energy 

 transfer from the shorter wave-length chromophores to chlorophyll is inter- 

 rupted, as shown in ruptured cells. The studies of whole cells suggest the 

 existence of the direct energy transfer from the shorter wave-length 

 chromophore to chlorophyll in vivo. 



ACKNOWLEDGMENT 



The authors wish to express their gratitude to Dr. Norman Rosenberg 

 for helpful encouragement. 



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