putrescine and spermidine depletion produced by alpha-difluoromethylornithine , an irreversible inhibitor or ornithine decarboxylase ( ec 4.1.1.17 ) , resulted in a strikingly enhanced cellular uptake of methylglyoxal bis ( guanylhydrazone ) in cultured ehrlich ascites carcinoma cells and human lymphocytic leukemia cells .
C0002260
alpha-difluoromethylornithine
C0029282
ornithine