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

IL-5 Protein, Human

Cat. No.: HY-P7043
COA Handling Instructions

IL-5 Protein, Human is a selective activator of human eosinophil function.

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

Size Price Stock Quantity
10 μg $140 In-stock
Estimated Time of Arrival: December 31
50 μg $440 In-stock
Estimated Time of Arrival: December 31
100 μg $640 Get quote
250 μg   Get quote  

* Please select Quantity before adding items.

Top Publications Citing Use of Products
  • Biological Activity

  • Technical Parameters

  • Properties

  • Documentation

  • References


IL-5 Protein, Human is a selective activator of human eosinophil function.


Recombinant Human Interleukin-5 (rhIL-5) is a powerful and selective stimulator of human eosinophil function. IL-5 is thus the first hemopoietic factor whose elaboration in vivo can explain the selective eosinophilia and eosinophil activation seen in disease[1]. Recombinant human interleukin-5 (rhIL-5), in either liquid or semi- solid cultures, selectively induced eosinophil production from normal human bone marrow, with no activity on other cell lineages. Human interleukin-5 (IL-5) regulates the production of eosinophils in human bone marrowcultures: comparison and interaction with IL-1, IL-3, IL-6, and granulocyte-macrophage colony stimulating factor (GMCSF)[2].

Biological Activity
The ED50 is <1.0 ng/mL as measured by TF-1 cells, corresponding to a specific activity of >1.0 × 106 units/mg.



E. coli


Tag Free


P05113 (I20-S134, with an N-terminal Met.)

Gene ID
AA Sequence


Molecular Weight

Approximately 26.5 kDa


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


Lyophilized powder


Lyophilized after extensive dialysis against 25 mM Tris, pH 8.0.

Endotoxin Level

<0.2 EU/μg, determined by LAL method.


It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH2O.

Storage & Stability

Stored at -20°C. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer. It is recommended to freeze aliquots at -20°C or -80°C for extended storage.


Room temperature in continental US; may vary elsewhere.


IL-5 Protein, Human 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 Active 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 active calculator equation

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

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

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IL-5 Protein, Human
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