Increased O6-methylguanine-DNA methyltransferase activity and reduced mutability in 1-(4-amino-2-methyl-5-pyrimidinyl)methyl-3-(2- chloroethyl)-3-nitrosourea-resistant HeLa S3 cells.

Increased O6-methylguanine-DNA methyltransferase activity and reduced mutability in 1-(4-amino-2-methyl-5-pyrimidinyl)methyl-3-(2- chloroethyl)-3-nitrosourea-resistant HeLa S3 cells.