Indole-ring aromatic amino acid; least abundant proteinogenic residue and single-codon (UGG). Dominates protein UV absorbance at 280 nm; precursor to serotonin, melatonin, and niacin.
Indole-ring aromatic amino acid; least abundant proteinogenic residue and single-codon (UGG). Dominates protein UV absorbance at 280 nm; precursor to serotonin, melatonin, and niacin.