| ULS00113 | 
                    putrescine from L-ornithine | 
                    None - {{∅}} | 
                    True - {{t}} | 
                    Unconfirmed presence | 
                     | 
                
                
                    | UER00288 | 
                    putrescine from L-ornithine: step 1/1~1 L-ornithine => 1 CO(2) + 1 putrescine. | 
                    True - {{t}} | 
                    True - {{t}} | 
                    Confirmed presence | 
                     | 
                
                
                    | UCR00670 | 
                    L-ornithine = CO(2) + putrescine | 
                    True - {{t}} | 
                    True - {{t}} | 
                    Confirmed presence | 
                     | 
                
                
                    | UPA00535 | 
                    putrescine biosynthesis via L-ornithine pathway~The pathway for mammalian putrescine synthesis was demonstrated to occur via the decarboxylation of ornithine. | 
                    None - {{∅}} | 
                    True - {{t}} | 
                    Unconfirmed presence | 
                     |