we conclude that the cellular capacity to repair o6-chloroethylguanine adducts in dna , which is reflected in the methyl repair process , is an important factor in determining cytotoxic response , and that increased repair of o6-chloroethylguanine decreases cytotoxicity and causes fewer sister chromatid exchanges and dna interstrand cross-links to form in cells treated with chloroethylnitrosoureas .
C0037211
sister chromatid exchanges
C0007634
cells