KEGG Modules

Carbohydrate metabolism
Central carbohydrate metabolism
M00001 Glycolysis (Embden-Meyerhof pathway), glucose => pyruvate
M00002 Glycolysis, core module involving three-carbon compounds
M00003 Gluconeogenesis, oxaloacetate => fructose-6P
M00307 Pyruvate oxidation, pyruvate => acetyl-CoA
M00009 Citrate cycle (TCA cycle, Krebs cycle)
M00010 Citrate cycle, first carbon oxidation, oxaloacetate => 2-oxoglutarate
M00011 Citrate cycle, second carbon oxidation, 2-oxoglutarate => oxaloacetate
M00004 Pentose phosphate pathway (Pentose phosphate cycle)
M00006 Pentose phosphate pathway, oxidative phase, glucose-6P => ribulose-5P
M00007 Pentose phosphate pathway, non-oxidative phase, fructose-6P => ribose-5P
M00005 PRPP biosynthesis, ribose-5P => PRPP

Other carbohydrate metabolism
M00014 Glucuronate pathway (uronate pathway)
M00632 Galactose degradation, Leloir pathway, galactose => alpha-D-glucose-1P
M00854 Glycogen biosynthesis, glucose-1P => glycogen/starch
M00855 Glycogen degradation, glycogen => glucose-6P
M00130 Inositol phosphate metabolism, PI=> PIP2 => Ins(1,4,5)P3 => Ins(1,3,4,5)P4

Energy metabolism
ATP synthesis
M00142 NADH:ubiquinone oxidoreductase, mitochondria
M00143 NADH dehydrogenase (ubiquinone) Fe-S protein/flavoprotein complex, mitochondria
M00148 Succinate dehydrogenase (ubiquinone)
M00151 Cytochrome bc1 complex respiratory unit
M00158 F-type ATPase, eukaryotes
M00160 V-type ATPase, eukaryotes

Lipid metabolism
Fatty acid metabolism
M00082 Fatty acid biosynthesis, initiation
M00083 Fatty acid biosynthesis, elongation
M00085 Fatty acid elongation in mitochondria
M00415 Fatty acid elongation in endoplasmic reticulum
M00086 beta-Oxidation, acyl-CoA synthesis
M00087 beta-Oxidation

Lipid metabolism
M00098 Acylglycerol degradation
M00090 Phosphatidylcholine (PC) biosynthesis, choline => PC
M00092 Phosphatidylethanolamine (PE) biosynthesis, ethanolamine => PE
M00094 Ceramide biosynthesis
M00099 Sphingosine biosynthesis
M00100 Sphingosine degradation

Nucleotide metabolism
Purine metabolism
M00048 De novo purine biosynthesis, PRPP + glutamine => IMP
M00049 Adenine ribonucleotide biosynthesis, IMP => ADP,ATP
M00050 Guanine ribonucleotide biosynthesis, IMP => GDP,GTP
M00053 Deoxyribonucleotide biosynthesis, ADP/GDP/CDP/UDP => dATP/dGTP/dCTP/dUTP

Pyrimidine metabolism
M00051 De novo pyrimidine biosynthesis, glutamine (+ PRPP) => UMP
M00052 Pyrimidine ribonucleotide biosynthesis, UMP => UDP/UTP,CDP/CTP
M00938 Pyrimidine deoxyribonucleotide biosynthesis, UDP => dTTP
M00046 Pyrimidine degradation, uracil => beta-alanine, thymine => 3-aminoisobutanoate

Amino acid metabolism
Serine and threonine metabolism
M00020 Serine biosynthesis, glycerate-3P => serine
M00621 Glycine cleavage system

Cysteine and methionine metabolism
M00338 Cysteine biosynthesis, homocysteine + serine => cysteine
M00035 Methionine degradation

Branched-chain amino acid metabolism
M00036 Leucine degradation, leucine => acetoacetate + acetyl-CoA

Arginine and proline metabolism
M00015 Proline biosynthesis, glutamate => proline
M00970 Proline degradation, proline => glutamate
M00972 Proline metabolism

Other amino acid metabolism
M00027 GABA (gamma-Aminobutyrate) shunt
M00118 Glutathione biosynthesis, glutamate => glutathione

Glycan metabolism
Nucleotide sugar biosynthesis
M00892 UDP-GlcNAc biosynthesis, eukaryotes, Fru-6P => UDP-GlcNAc
M01003 UDP-GlcNAc biosynthesis, GlcNAc => UDP-GlcNAc
M00549 UDP-Glc biosynthesis, Glc => UDP-Glc
M00554 UDP-Gal biosynthesis, Gal => UDP-Gal
M01000 GDP-Man biosynthesis, Fru-6P => GDP-Man
M01015 GDP-Man biosynthesis, Man => GDP-Man
M01016 GDP-L-Fuc biosynthesis, GDP-Man => GDP-L-Fuc

Glycan biosynthesis
M00055 N-glycan precursor biosynthesis
M00072 N-glycosylation by oligosaccharyltransferase
M00073 N-glycan precursor trimming
M00983 GPI-anchor remodeling

Glycosaminoglycan metabolism
M00057 Glycosaminoglycan biosynthesis, linkage tetrasaccharide
M00059 Glycosaminoglycan biosynthesis, heparan sulfate backbone

Metabolism of cofactors and vitamins
Cofactor and vitamin metabolism
M00120 Coenzyme A biosynthesis, pantothenate => CoA
M00842 Tetrahydrobiopterin biosynthesis, GTP => BH4
M00141 C1-unit interconversion, eukaryotes
M00868 Heme biosynthesis, animals and fungi, glycine => heme

Biosynthesis of terpenoids and polyketides
Terpenoid backbone biosynthesis
M00095 C5 isoprenoid biosynthesis, mevalonate pathway
M00367 C10-C20 isoprenoid biosynthesis, non-plant eukaryotes

Terpenoid biosynthesis
M00097 Lycopene biosynthesis, geranylgeranyl-PP => lycopene

Biosynthesis of other secondary metabolites
Biosynthesis of other compounds
M01013 Molting hormone biosynthesis, insects, 2,22,25-trideoxyecdysone => ecdysone => 20-hyd..