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.
1,1'-Ethylidene-bis-(L-tryptophan) is a potential impurity in L-tryptophan commercial products, promoting EoL-3 eosinophilic leukemia cell proliferation, enhancing eosinophil cationic protein release from human peripheral blood eosinophils, and boosting IL-5 production in human T cells. At 40 µg kg, it triggers fascia thickening, mast cell infiltration, inflammation, and fibrosis in mouse superficial adipose and panniculus carnosus tissues, serving as an eosinophilia-myalgia syndrome research model.
Methionyl-Tryptophan is a dipeptide composed of methionine and tryptophan. It is an incomplete breakdown product of protein digestion or protein catabolism.