UNIVERSITY OF CALIFORNIA, BERKELEY 
Cabk OFCSVCSTWX 9I0-366-7H4 
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DEPARTMENT OF MOLECULAR BIOLOGY 
WENDELL M STANLEY HALL 
BERKELEY. CALIFORNIA 94720 
June 23, 1982 
Dr. William Gartland, jr. 
Directxar 
Office of Heoorobinant CNA Activities 
Building 31, Rscm 4A52 
National Institutes of Health 
Bethesda, Maryland 20205 
Dear Dr. Gartland: 
I an writing to support the proposed amendnent to the Fteoombinant LNA 
Guidelines prohibiting the oonstruction of biological weapons by molecular 
cloning. I believe that this anendnent will be an important force in 
deterring a chngerous misuse of reccmbinant CNA technology. 
Sincerely, 
Harrison Echols 
Professor of Molecular Biology 
HE:td 
1813] 
