Methionyl-Tryptophan is a dipeptide composed of methionine and tryptophan. It is an incomplete breakdown product of protein digestion or protein catabolism.
Tryptophan is an amino acid precursor of serotonin and melatonin. DL-Tryptophan octyl ester is a tryptophan derivative with an octyl ester protected COOH group. This addition creates a stable, cell-permeable molecule capable of generating free tryptophan upon hydrolysis of the ester bond.