PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 25303896-10 2014 Droxidopa is a synthetic amino acid that is converted to norepinephrine by dopa-decarboxylase, the same enzyme that converts levodopa into dopamine in the treatment of Parkinson disease. Dopamine 139-147 dopa decarboxylase Homo sapiens 75-93