1.2.1.11	aspartate-semialdehyde dehydrogenase	spermidine biosynthesis II	
1.5.1.43	carboxynorspermidine synthase	spermidine biosynthesis II	
2.7.2.4	aspartate kinase	spermidine biosynthesis II	
4.1.1.96	carboxynorspermidine decarboxylase	spermidine biosynthesis II