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Recombinant Human CXCL6/GCP-2 Protein, CF

Catalog # 333-GC/CF | R&D Systems, Inc. a Bio-Techne Brand
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Key Product Details

Accession #


E. coli





Product Specifications


E. coli-derived human CXCL6/GCP-2 protein


>97%, by SDS-PAGE under reducing conditions and visualized by silver stain.

Endotoxin Level

<0.10 EU per 1 μg of the protein by the LAL method.

N-terminal Sequence Analysis


Predicted Molecular Mass

8 kDa


Measured by its ability to chemoattract BaF3 mouse pro‑B cells transfected with human CXCR2.
The ED50 for this effect is 3‑15 ng/mL.

Measured by its ability to induce myeloperoxidase release from cytochalasin B-treated human neutrophils. Schröder, J.M. et al. (1987) J. Immunol. 139:3474.
The ED50 for this effect is 0.5‑1.5 µg/mL.

Formulation, Preparation and Storage

Formulation Lyophilized from a 0.2 μm filtered solution in Acetonitrile and TFA.
Reconstitution Reconstitute at 100 μg/mL in sterile 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.

Background: CXCL6/GCP-2

GCP-2 (granulocyte chemotactic protein-2) also known as CXCL6, is a CXC chemokine initially isolated as a neutrophil chemoattractant from the MG-63 osteosarcoma cell line. Among human CXC chemokines, GCP-2 is most closely related to ENA-78 (78% amino acid (aa) sequence identity in the mature peptide region and 86% identity in the signal sequence). The structure and sequence of the genes for human GCP-2 and ENA-78 also exhibit close similarity suggesting the two genes may have originated from a gene duplication. LIX (LPS-induced CXC chemokine) was initially cloned as a gene induced by LPS in mouse fibroblasts. The predicted LIX protein sequence is identical to a previously purified mouse protein designated mouse GCP-2 based on its amino sequence similarity (60% sequence identity) to human GCP-2. Mouse GCP-2/LIX is also 54% identical with human ENA-78 at the amino acid sequence level.

Human GCP-2 cDNA encodes a propeptide of 114 amino acid residues with a predicted 37 aa residue signal peptide and 77 aa residue mature protein. Several forms of natural GCP-2 have been isolated from MG-63 conditioned media, indicating that GCP-2 undergoes limited processing at both the N- and C-termini. Human GCP-2 is a primary response gene whose induction by cytokines is attenuated by dexamethasone.

Human GCP-2 and mouse GCP-2/LIX have been shown to chemoattract and activate neutrophils, but not eosinophils and monocytes. It is likely that GCP-2 activities are mediated via the human or mouse CXCR2.


  1. Proost, P. et al. (1993) J. Immunol. 150:1000.
  2. Smith, J.B. and H.R. Herschman (1995) J. Biol. Chem. 270:16756.
  3. Rovai, L.E. et al. (1997) J. Immunol. 158:5257.
  4. Wuyts, A. et al. (1997) J. Immunol. 157:1736.

Alternate Names


Entrez Gene IDs

6372 (Human)

Gene Symbol



Product Documents for Recombinant Human CXCL6/GCP-2 Protein, CF

Certificate of Analysis

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Product Specific Notices for Recombinant Human CXCL6/GCP-2 Protein, CF

For research use only

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