PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 20512387-2 2011 The PAs are synthesized by a metabolic process which involves arginase (ARG), which catalyzes the enzymatic hydrolysis of L-arginine (L-Arg) to L-ornithine and urea, and ornithine decarboxylase (ODC), which catalyzes the enzymatic decarboxylation of L-ornithine in putrescine. Ornithine 250-261 ornithine decarboxylase 1 Homo sapiens 170-193