TABLE 4.

Predicting metabolic function genes based on PICRUSt2 analysis.

Pathway level 1	Pathway level 2
Metabolism	Global and overview maps
	Carbohydrate metabolism
	Amino acid metabolism
	Energy metabolism
	Metabolism of cofactors and vitamins
	Nucleotide metabolism
	Lipid metabolism
	Glycan biosynthesis and metabolism
	Biosynthesis of other secondary metabolites
	Metabolism of other amino acids
	Xenobiotics biodegradation and metabolism
	Metabolism of terpenoids and polyketides
Genetic information processing	Translation
	Replication and repair
	Folding, sorting and degradation
Environmental information processing	Signal transduction
Cellular processes	Cellular community - prokaryotes
	Cell growth and death
	Cell motility
	Transport and catabolism
Organismal systems	Endocrine system
	Aging
	Immune system
	Environmental adaptation
Human diseases	Drug resistance: antimicrobial
	Infectious disease: bacterial
	Cancer: overview
	Drug resistance: antineoplastic
	Endocrine and metabolic disease
	Infectious disease: viral