c57bl male mice were injected with n-methyl-n-nitrosourea ( mnua ) or n-ethyl-n-nitrosourea ( enua ) and the concentration of alkyl phosphotriesters in the dna of lung , liver , brain , kidney , spleen and thymus determined from the extent of degradation induced in isolated dna by alkali .
C0086045
concentration
C0006104
brain