Revision 11
Cell Signaling Technology

Orders: 877-616-CELL (2355) [email protected]

Support: 877-678-TECH (8324)

Web: [email protected] cellsignal.com

3 Trask LaneDanversMassachusetts01923USA
For Research Use Only. Not for Use in Diagnostic Procedures.
REACTIVITY:

H

SENSITIVITY:

Endogenous

MW (kDa):

Source/Isotype:

Mouse IgG2a kappa

UniProt ID:

#P07766

Entrez-Gene Id:

916

Product Information

Formulation

Supplied in 10 mM NaH2PO4, 150 mM NaCl, pH7.2, Low Endotoxin, Azide-free.

Storage

Stable for 12 months when stored at 4°C. Do not aliquot the antibody.

Specificity / Sensitivity

Human CD3ε Activating (OKT3) Mouse mAb (Low Endotoxin, Azide-free) recognizes endogenous levels of CD3ε protein.

Species Reactivity:

Human

Source / Purification

Monoclonal antibody is produced against human PBMC cells and purified via affinity chromatography.

Product Description

Endotoxin Less than or equal to 0.01 EU/μg, as determined by the LaL assay.

Background

When T cells encounter antigens via the T cell receptor (TCR), information about the quantity and quality of antigens is relayed to the intracellular signal transduction machinery (1). This activation process depends mainly on CD3 (Cluster of Differentiation 3), a multiunit protein complex that directly associates with the TCR. CD3 is composed of four polypeptides: ζ, γ, ε, and δ. Each of these polypeptides contains at least one immunoreceptor tyrosine-based activation motif (ITAM) (2). Engagement of the TCR complex with foreign antigens induces tyrosine phosphorylation in the ITAM motifs and phosphorylated ITAMs function as docking sites for signaling molecules such as ZAP-70 and the p85 subunit of PI-3 kinase (3,4). TCR ligation also induces a conformational change in CD3ε, such that a proline region is exposed and then associates with the adaptor protein Nck (5).

  1. Kuhns, M.S. et al. (2006) Immunity 24, 133-139.
  2. Pitcher, L.A. and van Oers, N.S. (2003) Trends Immunol. 24, 554-560.
  3. Osman, N. et al. (1996) Eur. J. Immunol. 26, 1063-1068.
  4. Hatada, M.H. et al. (1995) Nature 377, 32-38.
  5. Gil, D. et al. (2002) Cell 109, 901-912.

Species Reactivity

Species reactivity is determined by testing in at least one approved application (e.g., western blot).

Cross-Reactivity Key

H: human M: mouse R: rat Hm: hamster Mk: monkey Vir: virus Mi: mink C: chicken Dm: D. melanogaster X: Xenopus Z: zebrafish B: bovine Dg: dog Pg: pig Sc: S. cerevisiae Ce: C. elegans Hr: horse GP: Guinea Pig Rab: rabbit All: all species expected

Trademarks and Patents

Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.
Alexa Fluor is a registered trademark of Life Technologies Corporation.
All other trademarks are the property of their respective owners. Visit cellsignal.com/trademarks for more information.

Limited Uses

Except as otherwise expressly agreed in a writing signed by a legally authorized representative of CST, the following terms apply to Products provided by CST, its affiliates or its distributors. Any Customer's terms and conditions that are in addition to, or different from, those contained herein, unless separately accepted in writing by a legally authorized representative of CST, are rejected and are of no force or effect.

Products are labeled with For Research Use Only or a similar labeling statement and have not been approved, cleared, or licensed by the FDA or other regulatory foreign or domestic entity, for any purpose. Customer shall not use any Product for any diagnostic or therapeutic purpose, or otherwise in any manner that conflicts with its labeling statement. Products sold or licensed by CST are provided for Customer as the end-user and solely for research and development uses. Any use of Product for diagnostic, prophylactic or therapeutic purposes, or any purchase of Product for resale (alone or as a component) or other commercial purpose, requires a separate license from CST. Customer shall (a) not sell, license, loan, donate or otherwise transfer or make available any Product to any third party, whether alone or in combination with other materials, or use the Products to manufacture any commercial products, (b) not copy, modify, reverse engineer, decompile, disassemble or otherwise attempt to discover the underlying structure or technology of the Products, or use the Products for the purpose of developing any products or services that would compete with CST products or services, (c) not alter or remove from the Products any trademarks, trade names, logos, patent or copyright notices or markings, (d) use the Products solely in accordance with CST Product Terms of Sale and any applicable documentation, and (e) comply with any license, terms of service or similar agreement with respect to any third party products or services used by Customer in connection with the Products.

Revision 11
#92511

Human CD3ε Activating (OKT3) Mouse mAb (Low Endotoxin, Azide-free)

Human CD3ε Activating (OKT3) Mouse mAb (Low Endotoxin, Azide-free): Image 1 Expand Image
Flow cytometric analysis of Jurkat cells, untreated (blue) or treated with cross-linked Human CD3ε Activating (OKT3) Mouse mAb (Low Endotoxin, Azide-free) and Human CD28 Activating (CD28.2) Mouse mAb (Low Endotoxin, Azide-free) #91920 (10 μg/ml each, 15 min; green), using Phospho-SLP-76 (Ser376) (E3G9U) XP® Rabbit mAb #76384 (solid lines) or concentration-matched Rabbit (DA1E) mAb IgG XP® Isotype Control #3900 (dashed lines). Anti-rabbit IgG (H+L), F(ab')2 Fragment (Alexa Fluor® 488 Conjugate) #4412 was used as a secondary antibody.
Human CD3ε Activating (OKT3) Mouse mAb (Low Endotoxin, Azide-free): Image 2 Expand Image
Western blot analysis of extracts from Jurkat cells, untreated (1) or cross-linked using Human CD3ε Activating (OKT3) Mouse mAb (Low Endotoxin, Azide-free) and Human CD28 Activating (CD28.2) Mouse mAb (Low Endotoxin, Azide-free) #91920 (10 μg/ml, 30 min) (2), using Phospho-SLP-76 (Ser376) (D7S1K) Rabbit mAb #92711 (upper), SLP-76 (E4N7E) Rabbit mAb #25361 (middle), and β-Actin (D6A8) Rabbit mAb #8457 (lower).