Purines
Glycine, serine
Creatine (conjugated to bile acids)
Glycine
Phospholipids and sphingolipids
Serine
Thymine
Serine
GABA
Glutamate
CoA, taurine
Cysteine
Histamine
Histidine
Creatinine
Arginine
Polyamines
Arginine
NO
Arginine
Serotonin
Tryptophan
NAD and NADP
Tryptophan
Melatonin
Tryptophan
Catecholamines
Tyrosine
T3, T4
Tyrosine
Melanin
Tyrosine
Urea
Arginine
Glutathione
Glutamate
Heme
Glycine