Please make an Tryptophan selection from the list below:

• Alanine
• Argnine
• Asparaginine
• Aspartic Acid
• Carnitine
• Citruline
• Cysteine
• Cystine
• GABA
• Glutamine
• Glycine
• Histidine
• Isoleucine
• Leucine
• Lysine
• Methionine
• Ornithine
• Phenylalanine
• Proline
• Pyroglutamate
• Serine
• Taurine
• Threonine
• Tryptophan
• Tyrosine
• Valine



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United States Dental Schools