the label from [ 3h5 ] deoxyuridine , [ 14c2 ] thymine , [ 14c2 ] thymidine , [ 14c2 ] cytosine and i114c2 ] uracil was incorporated into the pyr-mutant rna and dna at a much lower rate than into the wild type rna and dna .
C0040087
thymine
C0041917
uracil