THE ROCKEFELLER UNIVERSITY 
1230 YORK AVENUE • NEW YORK. NEW YORK 1C021 
December 6, 1979 
Dr. Donald S. Fredrickson, M.D. 
Director 
National Institutes of Health 
Public Health Service 
Department of Health, Education and Welfare 
Bethesda, MD 20014 
Dear Dr. Fredrickson: 
I would like to strongly support the proposed decision 
(Federal Register, Nov. 30th) to partially exempt many recom- 
binant DNA experiments involving E. coli K12 strains from 
stringent guidelines. I believe that this change is fully 
consistent with public safety and is essential to permit 
legitimate health related research dependent upon cloning 
techniques . 
Sincerelv yours , 
John P. Ford, M.D. 
JPFrlc 
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