true odc activity was determined by two methods : ( a ) addition of the inhibitors alpha-difluoromethylornithine ( dfmo ) , a specific irreversible inhibitor of odc , or aminooxyacetate ( aoa ) , an inhibitor that blocks the decarboxylation of ornithine by mitochondrial enzymes ;
C0002260
alpha-difluoromethylornithine
C0029277
ornithine