The Twenty

Atlas/Trp

W

Tryptophan

Trp

HydrophobicAromaticEssentialHydrophobic186 Da

Indole

  • The largest amino acid, and the rarest in most proteomes.
  • Its indole ring is the strongest UV absorber among the twenty (λmax ≈ 280 nm).

Mastery: unseen

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Structure of Tryptophan
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