1. Recombinant Proteins
  2. IL-21 Protein, Human

IL-21 Protein, Human

Cat. No.: HY-P7038
Handling Instructions

IL-21 Protein, Human is a class 1 cytokine, which is produced by activated CD4+ T cells. IL-21 Protein stimulation of T cells, B cells and NK cells leads to enhanced proliferation and mature effector function.

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

Protein Expression Service

Recombinant Proteins-MedChemExpress
Size Price Stock Quantity
10 μg $190 In-stock
Estimated Time of Arrival: December 31
50 μg $620 In-stock
Estimated Time of Arrival: December 31
100 μg   Get quote  
250 μg   Get quote  

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  • Technical Parameters

  • Properties

  • Documentation

rHuIL-21; Za11; IL21



E. coli


Q9HBE4 (Q32-S162)

Gene ID


Molecular Weight

Approximately 15.4 kDa

AA Sequence


Biological Activity
The ED50 is <0.5 ng/mL as measured by Mino cells, corresponding to a specific activity of >2.0 × 106 units/mg.

Lyophilized powder.


Lyophilized after extensive dialysis against PBS, pH 7.4.

Endotoxin Level

<1 EU/μg, determined by LAL method.


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

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.


Interleukin-21 (IL-21) is a pleiotropic cytokine that has key functions in both the innate and adaptive immunity and the regulation of autoimmunity. IL-21 has a range of activities likely to potentiate antitumor immunoresponses. IL-21 has a role as a single agent in the treatment of melanoma. IL-21 also has significant activity against various types of cancer in combination with monoclonal antibodies or signaling inhibitors[1]. Recombinant human interleukin-21 (rIL-21), a human recombinant interleukin, with Cetuximab, a monoclonal antibody, targeting the epidermal growth factor receptor[2].

  • Molarity Calculator

  • Dilution Calculator

The molarity calculator equation

Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

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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

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IL-21 Protein, Human
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