MEMORIAL SLOAN-KETTERING GANGER CENTER 
Dr. Donald S. Fredrickson 
Director 
National Institutes of Health 
Bethesda, Maryland 
Dear Dr. Fredrickson: 
I am heartily in support of the proposed Recombinant DNA 
Guidelines published in the Federal Register (Volume 44, No. 232) 
November 30, 1979. The recommendation with respect to £. col i 
K-12/P1 is excellent, especially since it represents a realistic 
evaluation of its safety after a number of years of experience. 
The ability to work under these Revised Guidelines will greatly 
facilitate new and promising studies just getting under way in 
my laboratory. 
12 7 5 YORK AVENUE. NEW YORK. NEW YORK 10021 
December 18, 1979 
Yours sincerely 
Dorothea Bennett, Ph.D. 
Member and Professor of Biology 
db/k 
[533] 
MEMORIAL HOSPITAL FOR CANCER AND ALLIED DISEASES 
SLOAN KETTERING INSTITUTE FOR CANCER RESEARCH 
SLOAN KETTERING DIVISION. GRADUATE SCHOOL OF MEDICAL SCIENCES. CORNELL UNIVERSITY 
