ID   2.5.1.22
DE   spermine synthase.
AN   spermidine aminopropyltransferase.
CA   S-adenosyl 3-(methylsulfanyl)propylamine + spermidine = H(+) + S-methyl-
CA   5'-thioadenosine + spermine.
CC   -!- The enzyme from mammalia is highly specific for spermidine,
CC       cf. EC 2.5.1.16 and EC 2.5.1.23.
DR   P09158, SPEE_ECOLI ;  Q5SK28, SPEE_THET8 ;  Q94BN2, SPSY_ARATH ;
DR   Q3SZA5, SPSY_BOVIN ;  P52788, SPSY_HUMAN ;  P97355, SPSY_MOUSE ;
DR   Q12455, SPSY_YEAST ;
//