Lehninger Principles of Biochemistry, 8th ed., Ch. 18（胺基酸氧化與尿素循環）、Ch. 22（胺基酸、核苷酸生合成）
Harper's Illustrated Biochemistry, 32nd ed., Ch. 28–30（胺基酸代謝）、Ch. 31（卟啉與膽紅素）
Berg, Tymoczko, Stryer Biochemistry, 9th ed., Ch. 23–24
Taylor JL, Brown BL. Structural basis for dysregulation of aminolevulinic acid synthase in human disease. J. Biol. Chem. 2022; 298:101643.
NCBI Bookshelf: Urea Cycle Disorders
UpToDate：Inborn errors of amino acid metabolism（PKU、MSUD、homocystinuria 臨床指引）
Wikipedia: Urea cycle / Phenylketonuria / Catecholamine / Folate
