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Human CD3 epsilon & CD3 delta Heterodimer Protein, Fc Tag  pdf  pdf  pdf

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CD3E & CD3D,CD3 delta & CD3 epsilon,CD3 delta / epsilon


Human CD3 epsilon & CD3 delta Heterodimer Protein, Asp 23 - Asp 126 (CD3E, NP_000724.1) and & Phe 22 - Ala 105 (CD3D, AAH39035), was produced in human 293 cells (HEK293) at ACRObiosystems.

Predicted N-terminus: Asp 23 (CD3E) & Phe 22 (CD3D)

Molecular Characterization

CD3E(Asp 23 - Asp 126)NP_000724.1
FC(Pro 100 - Lys 330)P01857
CD3D(Phe 22 - Ala 105)AAH39035
FC(Pro 100 - Lys 330)P01857

The protein contains two subunits. Subunit CD3E is fused with Fc tag and his tag at the C-terminus and subunit CD3D is fused with Fc tag and flag tag at the C-terminus.

The protein has a calculated MW of 39.2 kDa (CD3E), 37.5 kDa (CD3D) . The protein migrates as 40-55 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.


Less than 1.0 EU per μg by the LAL method.


>95% as determined by SDS-PAGE.


Lyophilized from 0.22 μm filtered solution in PBS, pH7.4. Normally trehalose is added as protectant before lyophilization.

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Please see Certificate of Analysis for specific instructions.

For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.


For long term storage, the product should be stored at lyophilized state at -20°C or lower.

Please avoid repeated freeze-thaw cycles.

No activity loss is observed after storage at:

  1. 4-8°C for 12 months in lyophilized state;
  2. -70°C for 3 months under sterile conditions after reconstitution.


Human CD3E & CD3D (Cat. No. CDD-H52W0) SDS-PAGE gel

Human CD3E & CD3D on SDS-PAGE under reducing (R) condition. The gel was stained overnight with Coomassie Blue. The purity of the protein is greater than 95%.



Human CD3E & CD3D (Cat. No. CDD-H52W0) ELISA bioactivity

Immobilized OKT3 mAb at 5 μg/mL (100 μL/well) can bind Human CD3E & CD3D (Cat. No. CDD-H52W0) with a linear ranger of 0.15-2.5 μg/mL (QC tested).

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Human CD3E & CD3D (Cat. No. CDD-H52W0) ELISA bioactivity

Immobilized SP34-2 at 5 μg/mL (100 μL/well) can bind Human CD3E & CD3D, His Tag, Fc Tag, Flag Tag (Cat. No. CDD-H52W0) with a linear range of 1-20 ng/mL (Routinely tested).

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T-cell surface glycoprotein CD3 delta & CD3 epsilon chain, also known as CD3D & CD3E or CD3D&CD3E respectively, are single-pass type I membrane proteins. CD3D, together with CD3- epsilon(CD3E) , CD3-gamma and CD3-zeta, and the T-cell receptor alpha/beta and gamma/delta heterodimers, forms the T cell receptor-CD3 complex. T cell receptor-CD3 complex plays an important role in coupling antigen recognition to several intracellular signal-transduction pathways.


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