Other important amino acid derivatives
From WikiLectures
Trp → melatonin
Phe and Tyr → thyroid hormones, melanin
Gly → heme, purines, creatine, conjugation with bile acids
Arg and Ornithine → creatine, polyamines (spermidine, spermine)
Gly, Glu, Asp → purines and pyrimidines
Cys → taurine