fl W ESTABROOK Ph 0 
VIRGINIA LAZENBY 0 MARA PROFESSOR 
chairman biochemistry oepartmei 
H 
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 fully support the E. coli K 12/PI Recommendation made by the RAC on 
6 September 1979, and outlined in Federal Register ^4 (232): 69234-69246. 
I am convinced that use of E. coli K 12 strains in recombinant DNA studies 
represents no danger to the environment or to the human population. 
If the Recommendation is accepted. Biomedical research will be stim- 
ulated. The time period for scientific advancement will be considerably 
shortened . 
Again, I strongly urge that the E. coli K 12/PI Recommendation be 
passed . 
ALAN H. DAVIS, Ph.D 
Research Fellow 
AHD/nm 
[537] 
5323 HARRY HINES BLVD. 
DALLAS, TEXAS 75235 
1214) 688-3455 
