preferred_name: S-adenosyl 3-(methylsulfanyl)propylamine + putrescine = S-methyl-5'-thioadenosine + spermidine + H(+)
preferred_name_lc: s-adenosyl 3-(methylsulfanyl)propylamine + putrescine = s-methyl-5'-thioadenosine + spermidine + h(+)
label: "spermidine synthase"
label_lc: "spermidine synthase"