Recombinant Human CD3 delta/CD3d Fc Chimera Protein, CF Summary
|Human CD3 delta/CD3d |
Accession # P04234
CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.
In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.
|Formulation||Lyophilized from a 0.2 μm filtered solution in PBS.|
|Reconstitution||Reconstitute at 250 μg/mL in PBS.|
|Shipping||The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.|
|Stability & Storage:||Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
When Recombinant Human CD3 delta/CD3d Fc Chimera (Catalog # 10280-TC) is immobilized at 1.0 μg/mL, 100 μL/well, the concentration of Biotinylated Recombinant Human CD3E Fc Chimera that produces 50% of the optimal binding response is approximately 1.0-6.0 μg/mL.
2 μg/lane of Recombinant Human CD3 delta/CD3d Fc Chimera (Catalog # 10280-TC) was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Blue staining, showing bands at 45-55 kDa and 90-110 kDa, respectively.
Background: CD3 delta/CD3d
CD3d, also known as CD3 delta and T3D, is a single-pass type I membrane protein. CD3 delta/CD3d is part of the T-cell receptor/CD3 complex (TCR/CD3 complex) and is involved in T-cell development and signal transduction (1). The encoded membrane protein represents the delta subunit of the CD3 complex, and along with four other CD3 subunits, binds either TCR alpha/beta or TCR gamma/delta to form the TCR/CD3 complex on the surface of T cells (2). CD3 delta/CD3d contains an 84 amino acid extracellular domain, a 21 amino acid transmembrane domain, and a 45 amino acid cytoplasmic domain. Human CD3 delta/CD3d shares 89%, 61%, and 57% sequence identity in its extracellular domain with its cynomolgus monkey, rat, and mouse homologs, respectively. CD3 delta/CD3d, like other subunit members CD3G and CD3E of the TCR-CD3 complex, contains an extracellular Ig domain and a single immunoreceptor tyrosine-based activation motif (3, 4). Defects in CD3 delta/CD3d cause severe combined immunodeficiency autosomal recessive T-cell-negative/B-cell-positive/NK-cell-positive (T-/B+/NK+ SCID) which is a genetically and clinically heterogeneous group of rare congenital disorders characterized by impairment of both humoral and cell-mediated immunity, leukopenia, and low or absent antibody levels (5, 6).
- Gil, J. et al. (2011) J. Clin. Invest. 121:3872.
- Carson, G.R. et al. (1991) J. Biol. Chem. 266:7883.
- Birnbaum, M.E. et al. (2014). Proc. Natl. Acad. Sci. USA. 111:17576.
- Wucherpfennig, K. et al. (2010). Cold Spring Harb Perspect. Biol. 2:a005140.
- Kim, S.T. et al. (2010) J. Immunol. 185:2951.
- Holst, J. et al. (2008) Nat. Immunol. 9:658.
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