Abstract
A methyl methanesulfonate-sensitive strain was isolated from L5178Y mouse lymphoma cells. This mutant, M10, is more sensitive to killing by X-rays than the parent wild-type strain. This sensitivity to the alkylating agent and ionizing radiation did not change for 11 mo. since the isolation of the mutant. The plating efficiency, doubling time and sensitivity to UV light of M10 cells are not appreciably different from those of the wild-type cells.