SPDSY 2 Putrescine aminopropyltransferase 2 speE2 SPEE2_AQUAE aq_1350 MSVSTALKLCIFFTGFAGIVAEYSLATLATYLLGNAVLQWSVVISIFLLSMGLGSHASRYIPDDKTPLAFVLAELFLSLLVPFSVPIAYHFANNFLHLQTVIYGLSFVIGSLIGLEIPLAVRINNMYEELKVNISSVLEKDYLGSVPAGLLYAYLFLPKLGLPLTAILAGFFNLISAFLLVKVLKPKKFLKFLAIFTFFLLATYAVGHKRITLYEEQKFYGEEIIHFEQTPYQKIVLTRFGKHYSLYLDGHLQFSTLDEKRYHETLVHVPASFLKRYEKALILGGGDGLALRELRKYPFGEIHLVDLDPKMIEFSKKNLVMRKINENSFYDTRLKVFSEDAFNFVKKTKEKYDFVIVDLIDPRTPSSARVYSLEFYMSLKNKLKEDGIFITQAGDTFYKREVFCSILKTIKKAGFYAYPLVVYIPTFGEWGMVIGSKEPLNFENFELKEKTEFLNRERALAFYTLGKSLECPNVEVNTLLKPVLIYYYYKIQN 493 Probable spermidine synthase 2 Catalyzes the production of spermidine from putrescine and decarboxylated S-adenosylmethionine (dcSAM), which serves as an aminopropyl donor (By similarity).