ubiquitin

degron

proteasome

aminotransferase (transaminase)

glutamate dehydrogenase

pyridoxal phosphate (PLP)

pyridoxamine phosphate (PMP)

glucose–alanine cycle

urea cycle

carbamoyl phosphate synthetase

N-acetylglutamate

ketogenic amino acid

glucogenic amino acid

biopterin

phenylketonuria