DINITROPHENYLATION OF RIBONUCLEASE A 57 



Acknowledgments 



This research at Brookhaven National Laboratory has been performed 

 under the auspices of the United States Atomic Energy Commission. The 

 participation of one of us (C. H. W. H.) at the Symposium was made 

 possible by the combined support of the National Science Foundation 

 (grant No. NSF-G- 12926) and the United States Atomic Energy Com- 

 mission. We wish to thank Mrs. B. M. Floyd for her assistance in the 

 performance of the amino acid analyses. 



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