the study examines the effects of polyamines on growth of cultured neurons from 6-day-old rat cerebellar cortex , by means of : ( a ) irreversible inhibition of ornithine decarboxylase activity with alpha-difluoromethylornithine , and ( b ) treatment with the exogenous diamine putrescine and the polyamines spermidine and spermine , in the presence of sera from different sources .
C0011957
diamine
C0032433
polyamines