PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 1358085-3 1992 The sharp rise in putrescine levels observed following severe cellular stress is most probably the result of an increase in ODC activity and decrease in SAMDC activity or an activation of the interconversion of spermidine into putrescine via the enzymes spermidine N-acetyltransferase and polyamine oxidase. Putrescine 18-28 polyamine oxidase Homo sapiens 289-306