Table 4 The top 20 KEGG pathways

Purine metabolism

696

47

Methane metabolism

239

27

Pyrimidine metabolism

218

25

Thiamine metabolism

209

6

Oxidative phosphorylation

203

9

Pyruvate metabolism

194

26

Glycolysis/Gluconeogenesis

187

25

Arginine and proline metabolism

182

37

Aminoacyl-tRNA biosynthesis

180

21

Propanoate metabolism

167

14

Carbon fixation pathways in prokaryotes

164

19

Amino sugar and nucleotide sugar metabolism

158

27

Citrate cycle (TCA cycle)

156

19

Alanine, aspartate and glutamate metabolism

152

27

Valine, leucine and isoleucine degradation

146

18

Fatty acid metabolism

138

17

Glycine, serine and threonine metabolism

132

26

Tryptophan metabolism

128

14

Starch and sucrose metabolism

124

32

Glutathione metabolism

120

16