Spermidine Biosynthesis

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Note 1: All compounds are shown protonated as expected under physiological conditions.

Note 2: See also biosynthesis from ornithine.

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S-adenosyl-L-methionine biosynthesis
agmatine biosynthesis
spermine biosynthesis
EC 2.5.1.104 N¹-aminopropylagmatine synthase
EC 3.5.3.24 N¹-aminopropylagmatine ureohydrolase
EC 4.1.1.50 adenosylmethionine decarboxylase