the incorporation of 14c in dna as percent of total radioactivity in the tissue , 30 min after administration of [ 14c ] thymidine served as a measure of dna synthesis in vivo , and the amount of radioactivity recovered in dna as percent of total 14c in the tissues of 21 day old rats , injected with [ 14c ] thymidine on 2nd day after birth , indicated the turnover ( degradation ) of dna .
C0598312
dna synthesis
C0012854
dna