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Recombinant Human IL-7 Protein, Animal-Free

Catalog #: BT-007-AFL
1 Citation Datasheet / COA / SDS

New! Bypass reconstitution steps by using a liquid formulation of Animal-free Recombinant Human IL-7. Find out more here.

GMP Version Available: BT-007-GMP
GMP
Intended for preclinical researchers who may transition to GMP IL-7 for their clinical work
Catalog # Availability Size / Price Qty
BT-007-AFL-025
BT-007-AFL-01M

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Recombinant Human IL-7 Protein, Animal-Free Protein Bioactivity.
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Product Details
Citations (1)
FAQs
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Summary Product Datasheets Carrier Free Data Images Reconstitution Calculator Background Related Research Areas

Recombinant Human IL-7 Protein, Animal-Free Summary

Product Specifications

Purity
>97%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Endotoxin Level
<0.10 EU per 1 μg of the protein by the LAL method.
Activity
Measured in a cell proliferation assay using PHA-activated human peripheral blood lymphocytes (PBL). Yokota, T. et al. (1986) Proc. Natl. Acad. Sci. USA 83:5894. The ED50 for this effect is 0.100-0.500 ng/mL.The specific activity of Recombinant Human IL-7 is >1.00 x 108 units/mg, which is calibrated against the human IL-7 reference standard (NIBSC code: 90/530).
Source
E. coli-derived human IL-7 protein
Asp26-His177, with an N-terminal Met
Produced using non-animal reagents in an animal-free laboratory.
Accession #
P13232.1
N-terminal Sequence
Analysis
Met
Predicted Molecular Mass
17 kDa
SDS-PAGE
17 kDa, under reducing conditions

Product Datasheets

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BT-007-AFL

Product Datasheet
COA
SDS

Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.

BT-007-AFL

Formulation Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose.
Reconstitution Reconstitute at 100 - 500 μg/mL in PBS.
Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage: Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 3 months, -20 to -70 °C under sterile conditions after reconstitution.

Scientific Data

Bioactivity View Larger

The bioactivity of Recombinant Human IL-7 Protein, Animal Free (Catalog # BT-007-AFL) stimulates proliferation of PHA-activated human peripheral blood lymphocytes in a dose-dependent manner. The ED50 for this effect is 0.100-0.500 ng/mL.

SDS-PAGE View Larger

2 μg/lane of Recombinant Human IL-7 Animal-Free Protein (Catalog # BT-007-AFL) was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Blue staining, showing a single band at 17 kDa.

Reconstitution Calculator

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.

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Background: IL-7

IL-7 (interleukin-7) is a 25 kDa cytokine of the hemopoietin family that plays important roles in lymphocyte differentiation, proliferation, and survival (1-4). Human IL‑7 cDNA encodes 177 amino acids (aa) that include a 25 aa signal peptide (3). Human IL-7 shares approximately 60-63% aa sequence identity with mouse, rat, canine and feline IL-7, and 72-76% with equine, bovine, ovine, porcine, feline and canine IL-7. Human and mouse IL-7 exhibit cross-species activity (2, 3). IL-7 is produced by a wide variety of cells in primary and secondary lymphoid tissues, including stromal epithelial cells of the thymus, bone marrow, and intestines (1, 2, 5). Circulating IL-7 is limiting in healthy animals, but increases during lymphopenia (1, 6). IL-7 signals through a complex of the IL-7 Receptor alpha subunit (IL-7 R alpha, also known as CD127) with the common gamma chain ( gamma c) (1). The gamma c is also a subunit of the receptors for IL-2, -4, -9, -15, and -21 (1). IL-7 R alpha is expressed on double negative (CD4-CD8-) and CDD4 or CD8 single positive naïve and memory T cells, but undergoes IL-7-mediated down‑regulation and shedding during antigen-driven T cell proliferation, and is absent on regulatory T cells (1, 2, 6-11). IL-7 contributes to the maintenance of all naïve and memory T cells, mainly by promoting expression of the anti-apoptotic protein Bcl-2 (9-11). It is required for optimal T cell-dendritic cell interaction (6). IL-7 is expressed early in B cell development prior to the appearance of surface IgM (1, 5, 9). In mouse, IL-7 activation of IL-7 R alpha is critical for both T cell and B cell lineage development, while in humans, it is required for T cell but not for B cell development (4, 9, 12, 13). However, IL-7 functions in both mouse and human pro-B cells to suppress premature Ig light chain recombination during proliferative growth (14, 15).

References
  1. Sasson, S.C. et al. (2006) Curr. Drug Targets 7:1571.
  2. Barata, J.T. et al. (2006) Exp. Hematol. 34:1133.
  3. Goodwin, R.G. et al. (1990) Proc. Natl. Acad. Sci. USA 86:302.
  4. Namen, A.E. et al. (1988) Nature 333:571.
  5. Shalapour, S. et al. (2012) PLoS ONE 7: e31939.
  6. Saini, M. et al. (2009) Blood 113:5793.
  7. Park, J.H. et al. (2004) Immunity 21:289.
  8. Vranjkovic, A. et al. (2007) Int. Immunol. 19:1329.
  9. Sudo, T. et al. (1993) Proc. Natl. Acad. Sci. 90:9125.
  10. Seddon, B. et al. (2003) Nat. Immunol. 4:680.
  11. Schluns, K.S. et al. (2000) Nat. Immunol. 5:426.
  12. Peschon, J.J. et al. (1994) J. Exp. Med. 180:1955.
  13. Pribyl, J.A. and T.W. LeBien (1996) Proc. Natl. Acad. Sci. 93:10348.
  14. Johnson, K. et al. (2012) J. Immunol. 188:6084.
  15. Nodland, S.E. et al. (2011) Blood 118:2116.
Long Name
Interleukin 7
Entrez Gene IDs
3574 (Human); 16196 (Mouse); 25647 (Rat)
Alternate Names
IL7; IL-7; IL-7interleukin-7; interleukin 7; Lymphopoietin-1; PBGF

Manufacturing Specifications

Animal-Free Manufacturing Conditions
Our dedicated controlled-access animal-free laboratories ensure that at no point in production are the products exposed to potential contamination by animal components or byproducts. Every stage of manufacturing is conducted in compliance with R&D Systems' stringent Standard Operating Procedures (SOPs). Production and purification procedures use equipment and media that are confirmed animal-free.  

 Production

  • All molecular biology procedures use animal-free media and dedicated labware.
  • Dedicated fermentors are utilized in committed animal-free areas.

Purification

  • Protein purification columns are animal-free.
  • Bulk proteins are filtered using animal-free filters.
  • Purified proteins are stored in animal-free containers in a dedicated cold storage room.

    Quality Assurance

    • Low Endotoxin Level.
    • No impairment of biological activity.
    • High quality product obtained under stringent conditions.
    • For ex vivo research or bioproduction, additional documentation can be provided.

    Please read our complete Animal-Free Statement

    Citation for Recombinant Human IL-7 Protein, Animal-Free

    R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

    1 Citation: Showing 1 - 1

    1. Systemic Immune Dysfunction in Cancer Patients Driven by IL6 Induction of LAG3 in Peripheral CD8+ T Cells.
      Authors: Somasundaram A, Cillo A, Lampenfeld C, Workman C, Kunning S, Oliveri L, Velez M, Joyce S, Calderon M, Dadey R, Rajasundaram D, Normolle D, Watkins S, Herman J, Kirkwood J, Lipson E, Ferris R, Bruno T, Vignali D
      Cancer Immunol Res, 2022-07-01;10(7):885-899.
      Species: Human
      Sample Types: Whole Cells
      Applications: Bioassay

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