dna preparations from seven bacterial species and from e. coli phage t4 , and also the complementary l and h fractions into which these dna specimens , after denaturation , were separated by chromatography on methylated albumin-kieselguhr columns , were studied as templates in the rna polymerase system , and the nucleotide composition of the rna products was determined .
C0012924
dna
C0012854
dna