compared to 9l cells , 9l-2 cells are 10-fold more resistant to the cytotoxic effects , 34-fold more resistant to the induction of sister chromatid exchanges , and have 40 % fewer dna interstrand cross-links caused by treatment with 3- ( 4-amino-2-methyl-5-pyrimidinyl ) methyl-1- ( 2-chloroethyl ) -1-nitrosourea . in contrast , treatment of 9l and 9l-2 cells with 1-ethylnitrosourea produced approximately the same level of cell kill and induction of sister chromatid exchanges .
C0007634
cells
C0037211
sister chromatid