DEPARTMENT OF BIOCHEMISTRY 
Hf 
SOUTHWESTERN MEDICAL SCHOOL 
GRADUATE SCHOOL OF BIOMEDICAL SCIENCES 
SCHOOL OF ALLIED HEALTH SCIENCES 
December 19, 1979 
Donald S. Fredrickson, Director 
National Institutes of Health 
Bethesda, Maryland 20014 
Dear Dr. Fredrickson: 
I am writing to support the E. coli K 12/PI recomendation made by 
the RAC in September, 1979 as outlined in your Decision Document /Envi- 
romental impact Assessment published in Federal Register 44(232): 
69234-69246 of November 30, 1979. 
I have followed the debate about the safety of recombinant DNA 
research for several years both general and in E. coli K 12 in parti- 
cular. I have carefully reviewed the data and feel that I can support 
the E. coli K 12/PI recommendation wholeheartedly. 
Sincerely yours 
NANCY MARTIN, Ph.D. 
Assistant Professor of Biochemistry 
NM/nm 
[549] 
5323 HARRY HINES BLVD 
DALLAS. TEXAS 75235 
(214) 688-3338 
