1,1′-Ethylidenebis[L-tryptophan]

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1,1′-Ethylidenebis[L-tryptophan] is an impurity in the synthesis of L-tryptophan. 1,1′-Ethylidenebis[L-tryptophan] promotes the proliferation of eosinophilic leukemia cells, induces the release of eosinophil cationic protein from eosinophils, and stimulates T cells to produce IL-5. 1,1′-Ethylidenebis[L-tryptophan] (40 µg/kg) can induce fascia thickening, mast cell infiltration, and fibrosis in adipose and subcutaneous muscle tissues in mice. 1,1′-Ethylidenebis[L-tryptophan] can be used in immunology and inflammation research.

For research use only. We do not sell to patients.

1,1′-Ethylidenebis[L-tryptophan] Chemical Structure

CAS No. : 132685-02-0

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Description	1,1′-Ethylidenebis[L-tryptophan] is an impurity in the synthesis of L-tryptophan. 1,1′-Ethylidenebis[L-tryptophan] promotes the proliferation of eosinophilic leukemia cells, induces the release of eosinophil cationic protein from eosinophils, and stimulates T cells to produce IL-5. 1,1′-Ethylidenebis[L-tryptophan] (40 µg/kg) can induce fascia thickening, mast cell infiltration, and fibrosis in adipose and subcutaneous muscle tissues in mice. 1,1′-Ethylidenebis[L-tryptophan] can be used in immunology and inflammation research^[1]^[2]^[3].
Molecular Weight	434.49
Formula	C₂₄H₂₆N₄O₄
CAS No.	132685-02-0
SMILES	CC(N1C2=CC=CC=C2C(C[C@H](N)C(O)=O)=C1)N3C4=CC=CC=C4C(C[C@H](N)C(O)=O)=C3
Shipping	Room temperature in continental US; may vary elsewhere.
Storage	Please store the product under the recommended conditions in the Certificate of Analysis.
Purity & Documentation	Data Sheet (272 KB) Handling Instructions (2659 KB)
References	[1]. Yamaoka KA, et al. 1,1'-Ethylidenebis(tryptophan) (Peak E) induces functional activation of human eosinophils and interleukin 5 production from T lymphocytes: association of eosinophilia-myalgia syndrome with a L-tryptophan contaminant. J Clin Immunol. 1994 Jan;14(1):50-60. [Content Brief] [2]. Trucksess MW. Separation and isolation of trace impurities in L-tryptophan by high-performance liquid chromatography. J Chromatogr. 1993 Feb 5;630(1-2):147-50. [Content Brief] [3]. Love LA, et al. Pathological and immunological effects of ingesting L-tryptophan and 1,1'-ethylidenebis (L-tryptophan) in Lewis rats. J Clin Invest. 1993 Mar;91(3):804-11. [Content Brief]