although the doses of x-ray ( 312-2,500 r ) used for irradiation of cells caused impairment of dna synthesis and cell replication , co-cultivation of x-irradiated mulv- carrier cells with un-irradiated nonproducer cells of msv-induced tumour resulted in as much as 20-fold increase in msv retrieval compared with the un-irradiated control .
C0007634
cells
C0007590
cell replication