arginine decarboxylase activity molecular_function Reactome:REACT_110173 Reactome:REACT_102735 Reactome:REACT_112250 Reactome:REACT_28420 SpeA Reactome:REACT_88254 GO:0008792 Reactome:REACT_32646 L-arginine carboxy-lyase (agmatine-forming) Reactome:REACT_105329 MetaCyc:ARGDECARBOX-RXN Reactome:REACT_94852 Reactome:REACT_79432 Reactome:REACT_83171 KEGG:R00566 L-arginine carboxy-lyase activity Catalysis of the reaction: L-arginine + H(+) = agmatine + CO(2). Reactome:REACT_14806 RHEA:17644 Reactome:REACT_95070 Reactome:REACT_29623 Reactome:REACT_115439 EC:4.1.1.19 carboxy-lyase activity