single doses of ccl4 given to mice treated with corn oil for 2 to 12 weeks provided newly synthesized dna which was primarily ( greater than 80 % ) ds dna with ss regions or ends , but after 25 weeks of corn oil administration , a single dose of ccl4 resulted in newly synthesized dna with a greater proportion of ds dna .
C0012935
ds dna
C0012854
ds dna