PE anti-mouse CD275 (B7-H2, B7-RP1, ICOS Ligand) Antibody

Pricing & Availability
HK5.3 (See other available formats)
Regulatory Status
Other Names
ICOS ligand, ICOSL, B7 homolog 2, B7-H2, B7H2, B7RP1, B7h, ICOS-L
Rat IgG2a, κ
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Product Citations
C57Bl/6 mouse splenocytes stained with CD275 (clone HK5.3) PE
  • HK5dot3_PE_021808
    C57Bl/6 mouse splenocytes stained with CD275 (clone HK5.3) PE
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107405 50 µg $134
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CD275 is a 40 kD protein, also known as ICOS ligand, B7-RP1, B7-H2, and B7h. It is a member of the immunoglobulin receptor superfamily expressed on splenic B cells, dendritic cells, and macrophages. The expression of this antigen is increased by TNF-α stimulation and is highly upregulated by local inflammation. B7RP1 binds to ICOS and co-stimulates T cell and B cell responses. Two isoforms of this protein have been reported to occur as a result of alternative splicing. These isoforms show differential tissue distribution.

Product Details
Technical data sheet

Product Details

Verified Reactivity
Antibody Type
Host Species
Mouse B7-RP1 transfected cell line
Phosphate-buffered solution, pH 7.2, containing 0.09% sodium azide.
The antibody was purified by affinity chromatography, and conjugated with PE under optimal conditions.
0.2 mg/ml
Storage & Handling
The antibody solution should be stored undiluted between 2°C and 8°C, and protected from prolonged exposure to light. Do not freeze.

FC - Quality tested

Recommended Usage

Each lot of this antibody is quality control tested by immunofluorescent staining with flow cytometric analysis. For flow cytometric staining, the suggested use of this reagent is ≤1.0 µg per million cells in 100 µl volume. It is recommended that the reagent be titrated for optimal performance for each application.

Excitation Laser
Blue Laser (488 nm)
Green Laser (532 nm)/Yellow-Green Laser (561 nm)
Application Notes

Additional reported applications (for the relevant formats) include: in vitro and in vivo blocking of ligand binding1,2. For most successful immunofluorescent staining results, it may be important to maximize signal over background by using a relatively bright fluorochrome-antibody conjugate (Cat. No. 107405) or by using a high sensitivity, three-layer staining technique (e.g., including a biotinylated antibody (Cat. No. 107404) or biotinylated anti-rat IgG second step (Cat. No. 405402), followed by SAv-PE (Cat. No. 405204)). The LEAF™ purified antibody (Endotoxin <0.1 EU/µg, Azide-Free, 0.2 µm filtered) is recommended for functional assays (Cat. No. 107408). For in vivo studies or highly sensitive assays, we recommend Ultra-LEAF™ purified antibody (Cat. No. 107410) with a lower endotoxin limit than standard LEAF™ purified antibodies (Endotoxin <0.01 EU/µg).

Application References

(PubMed link indicates BioLegend citation)
  1. Iwai H, et al. 2003. J. Immunol. 171:2848. (Block)
  2. Kohyama M, et al. 2004. P. Natl. Acad. Sci. USA 101:4192. (Block)
  3. Zhang P, et al. 2007. J.Immunol. 178:474. PubMed
  4. del Rio ML, et al. 2011. Transpl. Int. 24:501. (FC) PubMed
Product Citations
  1. Zhou J, et al. 2019. Immunity. 50:403. PubMed
  2. Lu Y, et al. 2020. Cell. 180(6):1081-1097. PubMed
  3. Raineri D, et al. 2021. Biomedicines. 10:. PubMed
  4. Mansouri S, et al. 2020. Mucosal Immunol. 0.954861111. PubMed
  5. Zhang H, et al. 2021. Cell Reports. 35(6):109096. PubMed
  6. Barbet G, et al. 2018. Immunity. 48:584. PubMed
  7. Molina MS, et al. 2021. Front Immunol. 12:699128. PubMed
  8. Niven J, et al. 2019. Cell Rep. 28:21. PubMed
  9. Rivera CA, et al. 2022. Immunity. 55:129. PubMed
  10. Amend A, et al. 2021. Int J Mol Sci. 22:. PubMed
  11. Angulo G, et al. 2021. eLife. 10:00. PubMed
AB_2248797 (BioLegend Cat. No. 107405)

Antigen Details

B7 Immunoglobulin superfamily, approximately 40 kD

Isoform 1 has highest expression in lymphoid tissues, splenic B-cells, T-cells, dendritic cells and macrophages; lower levels in many non-lymphoid tissues. The expression of isoform 2 is restricted to heart, spleen, and kidney.

Binds to ICOS. Co-stimulates T cell responses including proliferation and cytokine secretion. Stimulates B cell proliferation and differentiation to plasma cells.
Cell Type
B cells, Dendritic cells, Lymphocytes, Macrophages, T cells
Biology Area
Costimulatory Molecules, Immunology
Molecular Family
CD Molecules
Antigen References

1. Yoshinaga SK, et al. 1999. Nature 402:827.
2. Ling V, et al. 2000. J. Immunol. 164:1653.
3. Ling V, et al. 2001. J. Immunol. 164:1653.

Gene ID
50723 View all products for this Gene ID
View information about CD275 on

Related FAQs

What type of PE do you use in your conjugates?
We use R-PE in our conjugates.
Go To Top Version: 1    Revision Date: 11/30/2012

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*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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This data display is provided for general comparisons between formats.
Your actual data may vary due to variations in samples, target cells, instruments and their settings, staining conditions, and other factors.
If you need assistance with selecting the best format contact our expert technical support team.

  • Biotin anti-mouse CD275 (B7-H2, B7-RP1, ICOS Ligand)

  • PE anti-mouse CD275 (B7-H2, B7-RP1, ICOS Ligand)

  • Ultra-LEAF™ Purified anti-mouse CD275 (B7-H2, B7-RP1, ICOS Ligand)


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