Amino acid metabolic pathway. This figure was drawn based on ARGININE BIOSYNTHESIS (mmu00220), ALANINE, ASPARATE AND GLUTAMATE METABOLISM (mmu00250), GLYCINE, SERINE AND THREONINE METABOLISM (mmu00260), CYSTEINE AND METHIONINE METABOLISM (mmu00270), VALINE, LEUCINE AND ISOLEUCINE DEGRADATION (mmu00280), LYSINE DEGRADATION (mmu00310), ARGININE BIOSYNTHESIS (mmu00220), ARGININE AND PROLINE METABOLISM (mmu00330), HISTIDINE METABOLISM (mmu00340), TYROSINE METABOLISM (mmu0350), PHENYLALANINE METABOLISM (mmu00360), and TRYPTOPHAN METABOLISM (mmu00380) pathway maps obtained from the KEGG website.