Biolegend, 300437, Ultra-LEAF™ Purified anti-human CD3 Antibody, 100μg

CD3ε is a 20 kD chain of the CD3/T-cell receptor (TCR) complex which is composed of two CD3ε, one CD3γ, one CD3δ, one CD3ζ (CD247), and a T-cell receptor (α/β or γ/δ) heterodimer. It is found on all mature T cells, NKT cells, and some thymocytes. CD3, also known as T3, is a member of the immunoglobulin superfamily that plays a role in antigen recognition, signal transduction, and T cell activation.
100μg
Verified Reactivity: Human
Reported Reactivity: Chimpanzee
Antibody Type: Monoclonal
Host Species: Mouse
Formulation: 0.2 µm filtered in phosphate-buffered solution, pH 7.2, containing no preservative.
Endotoxin Level: Less than 0.01 EU/µg of the protein (< 0.001 ng/µg of the protein) as determined by the LAL test.
Preparation: The Ultra-LEAF™ (Low Endotoxin, Azide-Free) antibody was purified by affinity chromatography.
Concentration: The antibody is bottled at the concentration indicated on the vial, typically between 2 mg/mL and 3 mg/mL. Older lots may have also been bottled at 1 mg/mL. To obtain lot-specific concentration and expiration, please enter the lot number in our Certificate of Analysis online tool.
Storage & Handling: The antibody solution should be stored undiluted between 2°C and 8°C. This Ultra-LEAF™ solution contains no preservative; handle under aseptic conditions.
Application: FC - Quality testedCyTOF® - VerifiedIHC-F, IP, Activ, WB - Reported in the literature, not verified in house
Recommended Usage: Each lot of this antibody is quality control tested by immunofluorescent staining with flow cytometric analysis. For flow cytometric staining, the suggested use of this reagent is ≤ 2.0 µg per million cells in 100 µl volume or 100 µl of whole blood. It is recommended that the reagent be titrated for optimal performance for each application.
Application Notes: Additional reported applications (for the relevant formats) include: immunohistochemical staining of acetone-fixed frozen sections4,6,7 and formalin-fixed paraffin-embedded sections11, immunoprecipitation1, activation of T cells2,3,5, Western blotting9, and spatial biology (IBEX)16,17. The LEAF™ purified antibody (Endotoxin < 0.1 EU/µg, Azide-Free, 0.2 µm filtered) is recommended for functional assays (Cat. No. 300413, 300414, and 300432). For highly sensitive assays, we recommend Ultra-LEAF™ purified antibody (Cat. No. 300437, 300438, 300465, 300466, 300473, 300474) with a lower endotoxin limit than standard LEAF™ purified antibodies (Endotoxin < 0.01 EU/µg).
Application References(PubMed link indicates BioLegend citation): Salmeron A, et al. 1991. J. Immunol. 147:3047. (IP) Graves J, et al. 1991. J. Immunol. 146:2102. (Activ) Lafont V, et al. 2000. J. Biol. Chem. 275:19282. (Activ) Ryschich E, et al. 2003. Tissue Antigens 62:48. (IHC) Thompson AG, et al. 2004. J. Immunol. 173:1671. (Activ) Sakkas LI, et al. 1998. Clin. Diagn. Lab. Immun. 5:430. (IHC) Mack CL, et al. 2004. Pediatr. Res. 56:79. (IHC) Thakral D, et al. 2008. J. Immunol. 180:7431. (FC) PubMed Van Dongen JJM, et al. 1988. Blood 71:603. (WB) Yoshino N, et al. 2000. Exp. Anim. (Tokyo) 49:97. (FC) Pollard, K. et al. 1987. J. Histochem. Cytochem. 35:1329. (IHC) Luckashenak N, et al. 2013. J. Immunol. 190:27. PubMed Laurent AJ, et al. 2014. PLoS One. 9:103683. PubMed Li J, et al. 2015. Cancer Res. 75:508. PubMed Stoeckius M, et al. 2017. Nat. Methods. 14:865-868. (PG) Radtke AJ, et al. 2020. Proc Natl Acad Sci USA. 117:33455-33465. (SB) PubMed Radtke AJ, et al. 2022. Nat Protoc. 17:378-401. (SB) PubMed
Product Citations: Tocheva AS, et al. 2020. Curr Protoc Immunol. 130:e103. PubMed Song P, et al. 2023. Front Pharmacol. 13:1071114. PubMed Sun W, et al. 2023. Nature. 614:309. PubMed Gartshteyn Y, et al. 2023. Life Sci Alliance. 6: . PubMed Jiang X, et al. 2023. Cell Discov. 9:7. PubMed Sungur CM, et al. 2022. J Clin Invest. Online ahead of print. PubMed Bellini N, et al. 2022. iScience. 25:105234. PubMed You G, et al. 2021. Sci Adv. 7:. PubMed Lerrer S, et al. 2021. iScience. 24:103020. PubMed Jeong S, et al. 2021. J Immunother Cancer. 9:. PubMed Texler B, et al. 2021. Cell Mol Gastroenterol Hepatol. 13:383. PubMed Martínez-Fábregas J, et al. 2020. Cell Rep. 33:108545. PubMed Leng T, et al. 2019. Cell Rep. 28:3077. PubMed Jiao S, et al. 2020. Cell. 179(5):1177-1190.e13.. PubMed Hirschberger S, et al. 2021. EMBO Mol Med. 13:e14323. PubMed NULL, et al. 2022. Cell. 185:916. PubMed
RRID: AB_11147760 (BioLegend Cat. No. 300437) AB_11146991 (BioLegend Cat. No. 300438) AB_2616677 (BioLegend Cat. No. 300465) AB_2616678 (BioLegend Cat. No. 300466) AB_2749887 (BioLegend Cat. No. 300473) AB_2749892 (BioLegend Cat. No. 300474)
Structure: Ig superfamily, with the subunits of CD3γ, CD3δ, CD3ζ (CD247) and TCR (α/β or γ/δ) forms CD3/TCR complex, 20 kD
Distribution: Mature T and NK T cells, thymocyte differentiation
Function: Antigen recognition, signal transduction, T cell activation
Ligand/Receptor: Peptide antigen bound to MHC
Cell Type: NKT cells, T cells, Thymocytes, Tregs
Biology Area: Immunology, Innate Immunity
Molecular Family: CD Molecules, TCRs
Antigen References: 1. Barclay N, et al. 1993. The Leucocyte FactsBook. Academic Press. San Diego. 2. Beverly P, et al. 1981. Eur. J. Immunol. 11:329. 3. Lanier L, et al. 1986. J. Immunol. 137:2501-2507.
Gene ID: 916
UniProt: View information about CD3 on UniProt.org
Clone: UCHT1
Regulatory Status: RUO
Workshop: III 471
Other Names: T3, CD3ε
Isotype: Mouse IgG1, κ
Q: Do you guarantee that your antibodies are totally pathogen free?
A: BioLegend does not test for pathogens in-house aside from the GoInVivo™ product line. However, upon request, this can be tested on a custom basis with an outside, independent laboratory.
Q: Does BioLegend test each Ultra-LEAF™ antibody by functional assay?
A: No, BioLegend does not test Ultra-LEAF™ antibodies by functional assays unless otherwise indicated. Due to the possible complexities and variations of uses of biofunctional antibodies in different assays and because of the large product portfolio, BioLegend does not currently perform functional assays as a routine QC for the antibodies. However, we do provide references in which the antibodies were used for functional assays and we do perform QC to verify the specificity and quality of the antibody based on our strict specification criteria.
Q: Does BioLegend test each Ultra-LEAF™ antibody for potential pathogens?
A: No, BioLegend does not test for pathogens in-house unless otherwise indicated.  However, we can recommend an outside vendor to perform this testing as needed.
Q: Have you tested this Ultra-LEAF™ antibody for in vivo or in vitro applications?
A: We don't test our antibodies for in vivo or in vitro applications unless otherwise indicated. Depending on the product, the TDS may describe literature supporting usage of a particular product for bioassay. It may be best to further consult the literature to find clone specific information.