chinese hamster ovary cells ( cho ) were x-irradiated in g1 and g2 stages of the cell cycle and subsequently neurospora endonuclease ( ne ) ( e.c.3.1.4 ) , an enzyme which is specific in cleaving single-stranded dna , was introduced into the cells , after making the cells permeable by treatment with inactivated sendai virus .
C1516337
stages
C0007634
cells