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Human IL-2 Protein, Tag Free (MALS verified)

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  • Synonym
    IL2,TCGF,lymphokine,Interleukin 2
  • Source
    Human IL-2 Protein, Tag Free(IL2-H5215) is expressed from human 293 cells (HEK293). It contains AA Ala 21 - Thr 153 (Accession # P60568-1).
    Predicted N-terminus: Ala 21
  • Molecular Characterization
    IL-2 Structure

    This protein carries no "tag".

    The protein has a calculated MW of 15.4 kDa. The protein migrates as 14 kDa and 15-16 kDa when calibrated against Star Ribbon Pre-stained Protein Marker under reducing (R) condition (SDS-PAGE) due to glycosylation.

  • Endotoxin
    Less than 0.01 EU per μg by the LAL method.
  • Host Cell Protein
    <0.5 ng/µg of protein tested by ELISA.
  • Host Cell DNA
    <0.02 ng/μg of protein tested by qPCR.
  • Sterility
    Negative
  • Mycoplasma
    Negative.
  • Purity

    >95% as determined by SDS-PAGE.

    >95% as determined by SEC-MALS.

  • Formulation

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

    Contact us for customized product form or formulation.

  • 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.

  • Storage

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

    Please 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.
SDS-PAGE
IL-2 SDS-PAGE

Human IL-2 Protein, Tag Free on SDS-PAGE under reducing (R) condition. The gel was stained with Coomassie Blue. The purity of the protein is greater than 95% (With Star Ribbon Pre-stained Protein Marker).

SEC-MALS
IL-2 MALS images

The purity of Human IL-2 Protein, Tag Free (Cat. No. IL2-H5215) is more than 95% and the molecular weight of this protein is around 14-22 kDa verified by SEC-MALS.

Bioactivity-Bioactivity CELL BASE
 IL-2 CELL

Human IL-2 Protein, Tag Free (Cat. No. IL2-H5215) stimulates proliferation of CTLL-2 cells. The specific activity of Human IL-2 Protein, Tag Free is > 0.60 x 10^7 IU/mg, which is calibrated against human IL-2 WHO International Standard (NIBSC code: 86/500) (QC tested).

Bioactivity-Cell Proliferation Assay
 IL-2 CELL PROLIFERATION

Human IL-2 Protein, Tag Free (Cat. No. IL2-H5215) has higher bioactivity than imported competitors when activates T cell proliferation with CD3/CD28 Activation Magnetic Beads.

  • Background
    Interleukin-2 (IL-2) is an interleukin, a type of cytokine immune system signaling molecule, which is a leukocytotrophic hormone that is instrumental in the body's natural response to microbial infection and in discriminating between foreign (non-self) and self. IL-2 mediates its effects by binding to IL-2 receptors, which are expressed by lymphocytes, the cells that are responsible for immunity. Mature human IL-2 shares 56% and 66% aa sequence identity with mouse and rat IL-2, respectively. Human and mouse IL-2 exhibit crossspecies activity. The receptor for IL-2 consists of three subunits that are present on the cell surface in varying preformed complexes. IL-2 is also necessary during T cell development in the thymus for the maturation of a unique subset of T cells that are termed regulatory T cells (T-regs). After exiting from the thymus, T-Regs function to prevent other T cells from recognizing and reacting against "self antigens", which could result in "autoimmunity". T-Regs do so by preventing the responding cells from producing IL-2. Thus, IL-2 is required to discriminate between self and non-self, another one of the unique characteristics of the immune system.
  • Clinical and Translational Updates

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  • Latest Research Phase:Approved

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