the effect of pre- and posttreatment incubation of uv-irradiated and ethyl methanesulphonate ( ems ) treated cells with non-toxic concentrations of inhibitors of de novo purine synthesis ( dnps ) on expression of potentially lethal and premutational damage at the hypoxanthine-guanine phosphoribosyl transferase ( hgprt ) locus in v79 cells has been examined .
C1708726
locus
C0007634
cells