This compound's synthase was the first enzyme known to exhibit substrate channeling.
This compound's synthase was the first enzyme known to exhibit substrate channeling. This amino acid is at the end of the anthranilate branch of the shikimic acid pathway. Protein absorbance at 280 nanometers mostly depends on this amino acid. A leader sequence containing two adjacent residues of this rare amino acid allows its synthase to be attenuated. This compound is hydroxylated, then decarboxylated in the Raphe nuclei to make serotonin. Jacques Monod  (moh-NOH)  discovered that this amino acid's (*)  operon is negative repressible, as contrasted with the  lac  operon. This heaviest canonical amino acid has a side chain with two rings and has only a single codon. For 10 points, name this amino acid symbolized W, which, despite a common myth, is not what causes Thanksgiving drowsiness.
This compound's synthase was the first enzyme known to exhibit substrate channeling.
tryptophan  [or  W  until it is read; or  Trp ]