Enzymatic reactions [BR:br08201]
2. Transferase reactions
2.5 Transferring alkyl or aryl groups, other than methyl groups
2.5.1 Transferring alkyl or aryl groups, other than methyl groups (only sub-subclass identified to date)
2.5.1.22
R02869 S-Adenosylmethioninamine + Spermidine <=> 5'-Methylthioadenosine + Spermine
