1. Recombinant Proteins
  2. Cytokines and Growth Factors
  3. Interleukin & Receptors
  4. IL-4
  5. IL-4 Protein, Human (HEK293, His)

IL-4 Protein, Human (HEK293, His)

Cat. No.: HY-P70764
COA Handling Instructions

IL-4 Protein, Human (HEK293, His) is a potent lymphoid cell growth factor, which stimulates the growth and survivability of B-cells and T-cells. IL-4 Protein, Human (HEK293, His) is a recombinant human interleukin-4 (rhIL-4) expressed in HEK 293 cells with a His tag.

For research use only. We do not sell to patients.

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Top Publications Citing Use of Products
  • Biological Activity

  • Technical Parameters

  • Properties

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  • References

Description

IL-4 Protein, Human (HEK293, His) is a potent lymphoid cell growth factor, which stimulates the growth and survivability of B-cells and T-cells. IL-4 Protein, Human (HEK293, His) is a recombinant human interleukin-4 (rhIL-4) expressed in HEK 293 cells with a His tag.

Background

Interleukin-4 (IL-4) is a cytokine that plays an important role in regulating inflammation and immune responses. It induces the differentiation of naïve helper T cells to Th2 cells. This cytokine binds the IL-4 receptor that also binds another cytokine interleukin 13 (IL-13), which may explain the overlapping functions of IL-4 and IL-13. IL-4, originally designated as B-cell growth factor-1 (BSFl), is described in the supernatant of activated EL-4 thymoma cells as a factor that can co-stimulate B-cells activated with submitogenic concentrations of anti-IgM[1].

Biological Activity

1. The cell proliferation assay using TF-1 human erythroleukemic cells has an ED50 value of 0.05-0.5 ng/mL.
2. Human IL-4-His can bind Human IL-4RA-Fc with an affinity constant of 0.99 nM.

Species

Human

Source

HEK293

Tag

C-6*His

Accession

P05112 (H25-S153)

Gene ID
Molecular Construction
N-term
IL-4 (H25-S153)
Accession # P05112
6*His
C-term
Synonyms
Interleukin-4; IL-4; B-Cell Stimulatory Factor 1; BSF-1; Binetrakin; Lymphocyte Stimulatory Factor 1; Pitrakinra; IL4
AA Sequence

HKCDITLQEIIKTLNSLTEQKTLCTELTVTDIFAASKNTTEKETFCRAATVLRQFYSHHEKDTRCLGATAQQFHRHKQLIRFLKRLDRNLWGLAGLNSCPVKEANQSTLENFLERLKTIMREKYSKCSS

Molecular Weight

18-21 kDa

Purity
  • Greater than 95% as determined by reducing SDS-PAGE.
Appearance

Lyophilized powder.

Formulation

Lyophilized from a 0.2 μm filtered solution of PBS, pH 7.4 or 20 mM PB, 150 mM NaCl, pH 7.4.

Endotoxin Level

<1 EU/μg, determined by LAL method.

Reconstitution

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH2O. For long term storage it is recommended to add a carrier protein (0.1% BSA, 5% HSA, 10% FBS or 5% Trehalose).

Storage & Stability

Stored at -20°C for 2 years. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

Shipping

Room temperature in continental US; may vary elsewhere.

Documentation
References

IL-4 Protein, Human (HEK293, His) Related Classifications

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

  • Reconstitution Calculator

  • Dilution Calculator

  • Specific Activity Calculator

The reconstitution calculator equation

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration
= ÷

The dilution calculator equation

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
× = ×
C1   V1   C2   V2

The specific activity calculator equation

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)
Unit/mg = 106 ÷ ng/mL

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IL-4 Protein, Human (HEK293, His)
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HY-P70764
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