Other important amino acid derivatives

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

• 
  Melatonin
• 
  Thyroxine
• 
  Triiodthyronine
• 
  Part of the melanin polymer structure
• 
  Heme
• 
  Purine
• 
  Pyrimidine
• 
  Creatine
• 
  Spermidin
• 
  Spermin
• 
  Taurin