in the first assay , which measures dna repair synthesis ( unscheduled dna synthesis , uds ) , lymphocyte cultures were stimulated with phytohemagglutinin ( pha ) for 66 h and then treated with hydroxyurea ( which blocks dna replication ) , irradiated with 100 gy of 60co , pulsed with [ 3h ] thymidine ( [ 3h ] tdr ) , and then exposed to pulsed emfs for 6 h ( the period in which cells repaired dna damage ) .
C0012899
unscheduled dna synthesis
C0012860
dna damage