title: X-ray inhibition of DNA synthesis at discrete times during S phase in synchronous human diploid fibroblasts.
mesh_terms: D002455:Cell Division; D004247:DNA / Q000096:biosynthesis*; D004171:Diploidy; D005347:Fibroblasts / Q000528:radiation effects*; D006801:Humans; D007399:Interphase; D013997:Time Factors
chemical_list: D004247:DNA