restoration of the intracellular polyamine content , by addition to the medium of polyamines or a high concentration of l-ornithine , the substrate of l-ornithine decarboxylase , further demonstrates that the antiproliferative effects of ( 2r , 5r ) -6-heptyne-2,5-diamine do result from polyamine deficiency .
C0011957
diamine
C0032433
polyamine