Reported enzyme(s):

Possible enzyme(s):
1.5.99.6 spermidine dehydrogenase
2.5.1.16 spermidine synthase
2.5.1.22 spermine synthase
2.5.1.45 homospermidine synthase (spermidine-specific)
2.5.1.46 deoxyhypusine synthase

Reported enzyme(s):

Possible enzyme(s):
2.1.1.13 methionine synthase
2.1.1.14 5-methyltetrahydropteroyltriglutamate-homocysteine S-methyltransferase
2.1.1.3 thetin-homocysteine S-methyltransferase
2.1.1.5 betaine-homocysteine S-methyltransferase
2.1.1.86 tetrahydromethanopterin S-methyltransferase