the alpha-putrescinylthymine ( putthy ) in bacteriophage phiw-14 dna is synthesized at the mononucleotide level : it is labeled by uracil or deoxyuridine but not by thymidine , and it appears in the acid-soluble pool of infected cells before the onset of phage dna synthesis .
C0012854
dna
C0598312
dna synthesis