we investigated the cytotoxic effects of nitrosoureas with and without a 42-hr preincubation with the ornithine decarboxylase ( ec 4.1.1.17 ) inhibitor alpha-difluoromethylornithine ( dfmo , 1 mm ) in a mer+ ( methylation excision repair positive ) human cell line .
C0029282
ornithine decarboxylase
C0002260
alpha-difluoromethylornithine