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≥98% (HPLC), solid

LY-374973, N-[N-(3,5-Difluorophenacetyl)-L-alanyl]-S-phenylglycine t-butyl ester, GSI-IX
Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:
MDL number:
PubChem Substance ID:

biological source

synthetic (organic)

Quality Level


≥98% (HPLC)






DMSO: ~18 mg/mL


Eli Lilly

storage temp.


SMILES string




InChI key



5 mg in glass bottle
25 mg in poly bottle

Biochem/physiol Actions

DAPT is a γ-secretase inhibitor and indirectly an inhibitor of Notch, a γ-secretase substrate. Other γ-secretase substrates include LDL receptor-related protein, E-cadherin and ErbB-4. As an inhibitor of γ-secretase, DAPT may be useful in the study of β-amyloid (Aβ) formation. DAPT has been shown to inhibit Notch signaling in studies of autoimmune and lymphoproliferative diseases, such as ALPS and lupus erythematosus (SLE), as well as in cancer cell growth, angiogenesis, and differentiation of human induced pluripotent stem cells (hIPSC).

Features and Benefits

This compound is a featured product for Neuroscience research. Click here to discover more featured Neuroscience products. Learn more about bioactive small molecules for other areas of research at
This compound was developed by Eli Lilly. To browse the list of other pharma-developed compounds and Approved Drugs/Drug Candidates, click here.

Storage Class Code

13 - Non Combustible Solids



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Origin

Enter Lot Number to search for Certificate of Origin (COO).

More documents

Quotes and Ordering

  1. Which document(s) contains shelf-life or expiration date information for a given product?

    If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.

  2. How do I get lot-specific information or a Certificate of Analysis?

    The lot specific COA document can be found by entering the lot number above under the "Documents" section.

  3. What is Product D5942, DAPT soluble in?

    DAPT is soluble in DMSO at approximately 18 mg/ml.

  4. Are solutions of Product D5942, DAPT stable?

    Sigma has not evaluated the solution stability of DAPT. However, in a study of cultured insect cells, DAPT inhibited γ-secretase activity for 12 hours, which is indicative of its stability in solution at a presumed 37 °C temperature. Pitsi, D., and Octave, J.N., Presenilin 1 stabilizes the C-terminal fragment of the amyloid precursor protein independently of γ-secretase activity. J. Biol. Chem., 279(24), 25333-25338 (2004).

  5. Is Product D5942, DAPT, a reversible or irreversible inhibitor of beta secretase?

    The literature indicates that in a treatment of PDAPP neuronal cultures with DAPT, removal of DAPT from the protocol restores amyloid precursor protein β production. This implies that DAPT may be a reversible inhibitor. Dovey, H.F., et al. Functional gamma-secretase inhibitors reduce beta-amyloid peptide levels in brain. J. Neurochem., 76(1), 173-181 (2001).

  6. How do I find price and availability?

    There are several ways to find pricing and availability for our products. Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers.

  7. What is the Department of Transportation shipping information for this product?

    Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product. 

  8. My question is not addressed here, how can I contact Technical Service for assistance?

    Ask a Scientist here.

Yu-Chen Ye et al.
Cancer research, 79(16), 4160-4172 (2019-07-04)
Tumor-associated macrophages (TAM) play pivotal roles in tumor progression and metastasis, but the contribution and regulation of different macrophage populations remain unclear. Here we show that Notch signaling plays distinct roles in regulating different TAM subsets in hepatocellular carcinoma (HCC).
Xin Wang et al.
Oncotarget, 7(47), 77749-77763 (2016-10-27)
MAM and EGF containing gene (MAEG), also called Epidermal Growth Factor-like domain multiple 6 (EGFL6), belongs to the epidermal growth factor repeat superfamily. The role of Maeg in zebrafish angiogenesis remains unclear. It was demonstrated that maeg was dynamically expressed
Antonia Sambola et al.
Cardiovascular drugs and therapy, 33(4), 425-433 (2019-07-25)
The impact of short or prolonged use of triple therapy (TT) on outcomes in patients with atrial fibrillation (AF) and high risk of bleeding undergoing percutaneous coronary intervention (PCI) is unclear. We compared clinical outcomes according to the duration of
Jonathan E Wosen et al.
Frontiers in immunology, 10, 1970-1970 (2019-09-05)
The role of intestinal epithelial cells (IECs) in mucosal tolerance and immunity remains poorly understood. We present a method for inducing MHC class II (MHC-II) in human enteroids, "mini-guts" derived from small intestinal crypt stem cells, and show that the
Masahiro Yoshioka et al.
Journal of experimental & clinical cancer research : CR, 36(1), 101-101 (2017-08-03)
Epidermal growth factor receptor (EGFR) plays a pivotal role in the pathophysiology of esophageal squamous cell carcinoma (ESCC). However, the clinical effects of EGFR inhibitors on ESCC are controversial. This study sought to identify the factors determining the therapeutic efficacy


Cancer Stem Cells: Targets for Cancer Therapy

Cancer stem cell media, spheroid plates and cancer stem cell markers to culture and characterize CSC populations.

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