Product Information

Contents: Carrier-Free Recombinant Human IL-7 (Interleukin-7, IL7)
Catalog Number: 34-8079
Sizes: 100 ug, 500 ug
Formulation: Sterile liquid; 35% (v/v) acetonitrile, 0.1% trifluoracetic acid (v/v) with no carriers or stabilizers. 0.22 uM filtered.
Storage Conditions: For greatest stability, keep concentration of primary stock at or above 10 µg/ml. For long term storage, aliquot into polypropylene vials (volumes of 20 µl or greater) and store at or below -80°C. Avoid repeated freeze/thaw cycles.
Handling Conditions: For best recovery, always quick-spin vial prior to opening. For dilution of current stock, always include carrier protein (1% BSA or 10% FBS) in the buffered saline diluent.
Source: E. coli expressed amino acids asp 26-his 177 of mature human IL-7 (accession # NM_000880).
Molecular Mass: The methionylated polypeptide has a predicted molecular mass of 17,518. The DTT reduced protein migrates as a 18 kDa polypeptide. The nonreduced protein migrates as a 16 kDa protein on non-reducing SDS-PAGE.
Purity: Greater than 98%, as determined by SDS-PAGE
Endotoxin Level: Less than 0.01 ng/ug cytokine as determined by the LAL assay.
Bioactivity: Measured by dose-dependent proliferation of PHA-activated human PBMCs. The ED₅₀ is typically 2.0 ng/ml, corresponding to a specific activity of approximately 5x10⁵ Units/mg.

Available Formats of This Product
Cat. No.	Format	Excite (nm)	Emit (nm)	Reported Applications
34-8079	Carrier-Free Recombinant Human IL-7 (Interleukin-7, IL7)	N/A	N/A	BA
14-8079	Recombinant Human IL-7 (Interleukin-7, IL7)	N/A	N/A	BA

Questions? Please consult our answers to frequently asked questions at http://www.ebioscience.com/faq.

Description

Human IL-7, also called lymphopoietin 1 (LP-1), a pre-B cell growth factor, is a ~28 kDa factor produced by bone marrow and thymic stromal cell and spleen cells. IL-7 is a stromal cell-derived growth factor for progenitor B cells and T cells. The main population in the thymus responsive to IL-7 is CD4^-CD8^-. It also stimulates proliferation and differentiation of mature T cells and NK cells.

Applications Reported

For research use only, not for diagnostic or therapeutic use. Recombinant human IL-7 is biologically active.

Applications Tested

This recombinant human IL-7 has been tested in bioassay of dose-dependent proliferation of PHA-activated human PBMCs, yielding an ED₅₀ of approximately 2.0 ng/ml, corresponding to a specific activity of approximately 5x10⁵ Units/mg.

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