Recombinant Human CXCL5 (ENA-78) (carrier-free)

Pricing & Availability
Regulatory Status
Other Names
Epithelial neutrophil-activating protein (ENA78), granulocyte chemotactic protein-2 (GCP-2), alveolar macrophage chemotactic factor-II (AMCF-II)
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Product Citations
Recombinant human CXCL5 chemoattracts Baf3-mCXCR2 transfectants in a dose-dependent manner. The ED50 for this effect is 10 – 60 ng/mL.
  • Human_CXCL5_RECOM_CF_1_083023
    Recombinant human CXCL5 chemoattracts Baf3-mCXCR2 transfectants in a dose-dependent manner. The ED50 for this effect is 10 – 60 ng/mL.
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573406 100 µg 231€
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CXCL5 is an ELR+CXC chemokine characterized by a Glu-Leu-Arg (ELR) motif preceding the characteristic CXC sequence. CXCL5 chemoattracts and activates neutrophils during inflammation through the binding to CXCR2. CXCL5 occurs in different NH2- and COOH-truncated forms, and both NH2-terminal and COOH-terminal truncation result in an increase in neutrophil chemotactic potency.  CXCL5(8–78) and CXCL5(9–78) induce a higher neutrophil influx in vivo compared with CXCL5(1–78). CXCL5 regulates the availability of binding sites for other ELR+ CXC chemokines released during inflammation, through its interaction with erythrocyte duffy antigen receptor (DARC). As a result, CXCL5 induces the increase of CXCL1 and CXCL2 in a model of pulmonary inflammation.  Therefore, CXCL5 acts as a regulator of chemokine scavenging and pulmonary host defense to bacterial infection. Lung epithelial cells express CXCR2; consequently, CXCL5 may modulate neutrophil transepithelial and transendothelial migration. High levels of CXCL5 have been associated to prostate tumor, gastric cancer, and pancreatic cancer progression.

Product Details
Technical Data Sheet (pdf)

Product Details

Human CXCL5, amino acids Ala37-Asn114 (Accession# NM_002994.3) was expressed in E. coli.
Molecular Mass
The 78 amino acid recombinant protein has a predicted molecular mass of approximately 8.35 kD. The DTT-reduced and non-reduced protein migrate at approximately 10 kD by SDS-PAGE. The N-terminal amino acid is Ala.
>98%, as determined by Coomassie stained SDS-PAGE.
0.22 µm filtered protein solution is in PBS.
Endotoxin Level
Less than 0.01 ng per µg cytokine as determined by the LAL method.
10 and 25 µg sizes are bottled at 200 µg/mL. 100 µg size and larger sizes are lot-specific and bottled at the concentration indicated on the vial. To obtain lot-specific concentration and expiration, please enter the lot number in our Certificate of Analysis online tool.
Storage & Handling
Unopened vial can be stored between 2°C and 8°C for up to 2 weeks, at -20°C for up to six months, or at -70°C or colder until the expiration date. For maximum results, quick spin vial prior to opening. The protein can be aliquoted and stored at -20°C or colder. Stock solutions can also be prepared at 50 - 100 µg/mL in appropriate sterile buffer, carrier protein such as 0.2 - 1% BSA or HSA can be added when preparing the stock solution. Aliquots can be stored between 2°C and 8°C for up to one week and stored at -20°C or colder for up to 3 months. Avoid repeated freeze/thaw cycles.
Recombinant human CXCL5 chemoattracts Baf3-mCXCR2 transfectants in a dose-dependent manner. The ED50 for this effect is 10 – 60 ng/mL.


Application Notes

BioLegend carrier-free recombinant proteins provided in liquid format are shipped on blue-ice. Our comparison testing data indicates that when handled and stored as recommended, the liquid format has equal or better stability and shelf-life compared to commercially available lyophilized proteins after reconstitution. Our liquid proteins are verified in-house to maintain activity after shipping on blue ice and are backed by our 100% satisfaction guarantee. If you have any concerns, contact us at

Antigen Details


Endothelial cells, fibroblasts, neutrophils, monocytes, macrophages, platelets, alveolar type II cells

CXCL5 chemoattracts and activates neutrophils during inflammation, and it is induced by LPS and inflammatory cytokines. NH2-terminal truncation enhances, whereas citrullination decreases the chemotactic properties of CXCL5.
Cell Type
Hematopoietic stem and progenitors
Biology Area
Cell Biology, Signal Transduction, Stem Cells
Molecular Family
Antigen References

1. Walz A, et al. 1991. J. Exp. Med. 174:1355.
2. Wuyts A, et al. 1999. J. Immunol. 163:6155.
3. Jeyaseelan S, et al. 2005. Am. J. Respir. Cell. Mol. Biol. 32:531.
4. Mei J, et al. 2010. Immunity 33:106.
5. Mortier A, et al. 2010. J. Biol. Chem. 285:29750.
6. Grommes J and Soehnlein O. 2011. Mol. Med. 17:293.
7. Liu Y, et al. 2011. J. Immunol. 186:3197.
8. Kuo PL, et al. 2011. J. Cell. Physiol. 226:1224.

Gene ID
6374 View all products for this Gene ID
View information about CXCL5 on

Related FAQs

Why choose BioLegend recombinant proteins?

     • Each lot of product is quality-tested for bioactivity as indicated on the data sheet.
     • Greater than 95% Purity or higher, tested on every lot of product.
     • 100% Satisfaction Guarantee for quality performance, stability, and consistency.
     • Ready-to-use liquid format saves time and reduces challenges associated with reconstitution.
     • Bulk and customization available. Contact us.
     • Learn more about our Recombinant Proteins.

How does the activity of your recombinant proteins compare to competitors?

We quality control each and every lot of recombinant protein. Not only do we check its bioactivity, but we also compare it against other commercially available recombinant proteins. We make sure each recombinant protein’s activity is at least as good as or better than the competition’s. In order to provide you with the best possible product, we ensure that our testing process is rigorous and thorough. If you’re curious and eager to make the switch to BioLegend recombinants, contact your sales representative today!

What is the specific activity or ED50 of my recombinant protein?

The specific activity range of the protein is indicated on the product datasheets. Because the exact activity values on a per unit basis can largely fluctuate depending on a number of factors, including the nature of the assay, cell density, age of cells/passage number, culture media used, and end user technique, the specific activity is best defined as a range and we guarantee the specific activity of all our lots will be within the range indicated on the datasheet. Please note this only applies to recombinants labeled for use in bioassays. ELISA standard recombinant proteins are not recommended for bioassay usage as they are not tested for these applications.

Have your recombinants been tested for stability?

Our testing shows that the recombinant proteins are able to withstand room temperature for a week without losing activity. In addition the recombinant proteins were also found to withstand four cycles of freeze and thaw without losing activity.

Does specific activity of a recombinant protein vary between lots?

Specific activity will vary for each lot and for the type of experiment that is done to validate it, but all passed lots will have activity within the established ED50 range for the product and we guarantee that our products will have lot-to-lot consistency. Please conduct an experiment-specific validation to find the optimal ED50 for your system.

How do you convert activity as an ED50 in ng/ml to a specific activity in Units/mg?

Use formula Specific activity (Units/mg) = 10^6/ ED50 (ng/mL)

Go To Top Version: 4    Revision Date: 08.30.2023

For research use only. Not for diagnostic use. Not for resale. BioLegend will not be held responsible for patent infringement or other violations that may occur with the use of our products.


*These products may be covered by one or more Limited Use Label Licenses (see the BioLegend Catalog or our website, BioLegend products may not be transferred to third parties, resold, modified for resale, or used to manufacture commercial products, reverse engineer functionally similar materials, or to provide a service to third parties without written approval of BioLegend. By use of these products you accept the terms and conditions of all applicable Limited Use Label Licenses. Unless otherwise indicated, these products are for research use only and are not intended for human or animal diagnostic, therapeutic or commercial use.


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