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 >  Protein>CD4 >CD4-HF255

FITC-Labeled Human CD4 Protein, Fc Tag DMF

分子别名(Synonym)

CD4,CD4mut,LEU3

表达区间及表达系统(Source)

FITC-Labeled Human CD4, Fc Tag (CD4-HF255) is expressed from human 293 cells (HEK293). It contains AA Lys 26 - Pro 396 (Accession # P01730). It is the FITC labeled form of Human CD4, Fc Tag (CD4-H5259).

Predicted N-terminus: Lys 26

Request for sequence

蛋白结构(Molecular Characterization)

CD4 Structure

This protein carries a human IgG1 Fc tag at the C-terminus.

The protein has a calculated MW of 67.7 kDa. The protein migrates as 67-80 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.

偶联(Conjugate)

FITC

Excitation source: 488 nm spectral line, argon-ion laser

Excitation Wavelength: 488 nm

Emission Wavelength: 535 nm

标记(Labeling)

The primary amines in the side chains of lysine residues and the N-terminus of the protein are conjugated with FITC using standard chemical labeling method. The residual FITC is removed by molecular sieve treatment during purification process.

蛋白标记度(Protein Ratio)

The FITC to protein molar ratio is 3-5.

内毒素(Endotoxin)

Less than 1.0 EU per μg by the LAL method.

纯度(Purity)

>95% as determined by SDS-PAGE.

制剂(Formulation)

Lyophilized from 0.22 μm filtered solution in PBS, pH7.4 with trehalose as protectant.

Contact us for customized product form or formulation.

重构方法(Reconstitution)

Please see Certificate of Analysis for specific instructions.

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

存储(Storage)

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

Please protect from light and avoid repeated freeze-thaw cycles.

This product is stable after storage at:

  1. -20°C to -70°C for 12 months in lyophilized state;
  2. -70°C for 3 months under sterile conditions after reconstitution.
 

电泳(SDS-PAGE)

CD4 SDS-PAGE

FITC-Labeled Human CD4, Fc Tag on SDS-PAGE under reducing (R) condition. The gel was stained with Coomassie Blue. The purity of the protein is greater than 95%.

 

活性(Bioactivity)-ELISA

CD4 ELISA

Immobilized Ibalizumab (Human IgG4) at 1 μg/mL (100 μL/well) can bind FITC-Labeled Human CD4, Fc Tag (Cat. No. CD4-HF255) with a linear range of 20-313 ng/mL (QC tested).

Protocol

CD4 ELISA

Immobilized HIV-1 [HIV-1/Clade C (16055)] GP120, His Tag (Cat. No. GP5-V15224) at 10 μg/mL (100 μL/well) can bind FITC-Labeled Human CD4, Fc Tag (Cat. No. CD4-HF255) with a linear range of 0.039-0.313 μg/mL (Routinely tested).

Protocol

 

活性(Bioactivity)-FACS

CD4 FACS

2e5 of CD4-CAR-293 cells transfected with anti-CD4-scFv were stained with 100 μL of 1 μg/mL of FITC-Labeled Human CD4 Protein, Fc Tag (Cat. No. CD4-HF255) and negative control protein respectively. FITC signal was used to evaluate the binding activity (QC tested).

Protocol

 

背景(Background)

T-cell surface glycoprotein CD4 is also known as T-cell surface antigen T4/Leu-3. CD4 contains three Ig-like C2-type (immunoglobulin-like) domains and one Ig-like V-type (immunoglobulin-like) domain. CD4 is accessory protein for MHC class-II antigen/T-cell receptor interaction. CD4 induces the aggregation of lipid rafts. CD4 is a primary receptor used by HIV-1 to gain entry into host T cells. HIV infection leads to a progressive reduction of the number of T cells possessing CD4 receptors. Therefore, medical professionals refer to the CD4 count to decide when to begin treatment for HIV-infected patients.

 

前沿进展

 
 
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CD4靶点信息
英文全称:T-cell surface antigen CD4
中文全称:T细胞表面抗原CD4
种类:Homo sapiens
上市药物数量:1详情
临床药物数量:23详情
最高研发阶段:批准上市
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