Alexa Fluor® 594 anti-human CD11a Antibody

Pricing & Availability
HI111 (See other available formats)
Regulatory Status
IV N231
Other Names
LFA-1α chain, Integrin αL subunit, αL Integrin, ITGAL
Mouse IgG1, κ
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Product Citations
Human neutrophils were fixed with 1% paraformaldehyde (PFA), then stained with 5 µg/ml anti-human CD11a (clone HI111) Alexa Fluor® 594 (red). Nuclei were counterstained with DAPI (blue). The image was captured with a 40X objective.
  • HI111_A594_CD11a_Antibody_ICC_080919
    Human neutrophils were fixed with 1% paraformaldehyde (PFA), then stained with 5 µg/ml anti-human CD11a (clone HI111) Alexa Fluor® 594 (red). Nuclei were counterstained with DAPI (blue). The image was captured with a 40X objective.
  • HI111_AF594_FC_111214
    Human peripheral blood lymphocytes were stained with CD11a (clone HI111) Alexa Flour® 594 (filled histogram) or mouse IgG1, κ Alexa Flour™ 594 isotype control (open histogram). The data was acquired by BD LSRFortessa™ cell analyzer equipped with the Yellow-Green Laser (561 nm).
Compare all formats See Alexa Fluor® 594 spectral data
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301222 100 µg £182
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CD11a is a 170-180 kD type I transmembrane glycoprotein also known as LFA-1α chain and integrin αL subunit. CD11a non-covalently associates with integrin β2 (CD18) to form LFA-1. It is expressed on all leukocytes, including B and T lymphocytes, monocytes, macrophages, neutrophils, basophils and eosinophils. It is absent on non-hematopoietic tissues and platelets. CD11a plays a central role in leukocyte cell-cell interactions and is important in lymphocyte costimulation. CD11a/CD18 binds to ICAM-1 (CD54), ICAM-2 (CD102), and ICAM-3 (CD50).

Product Details
Technical Data Sheet (pdf)

Product Details

Verified Reactivity
Reported Reactivity
African Green, Baboon, Cow, Capuchin monkey, Chimpanzee, Cynomolgus, Dog, Horse, Rabbit, Sheep
Antibody Type
Host Species
Phosphate-buffered solution, pH 7.2, containing 0.09% sodium azide.
The antibody was purified by affinity chromatography and conjugated with Alexa Fluor® 594 under optimal conditions.
0.5 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.

ICC - Quality tested
FC - Verified

Recommended Usage

Each lot of this antibody is quality control tested by immunocytochemistry. For immunocytochemistry, a concentration range of 2.5 - 10 μg/ml is recommended. It is recommended that the reagent be titrated for optimal performance for each application.

* Alexa Fluor® 594 has an excitation maximum of 590 nm, and a maximum emission of 617 nm.

Alexa Fluor® and Pacific Blue™ are trademarks of Life Technologies Corporation.

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Application Notes

Clone HI111 epitope maps to the top region of the I domain that is close to the putative ligand-binding site surrounding the MIDAS (metal ion-dependent adhesion site). HI111 is specific for the closed confirmation of the integrin8. Additional reported applications (for the relevant formats) include: immunohistochemical staining of acetone-fixed frozen sections, Western blotting2, and blocking of cell-cell interaction and inhibition the binding of ICAM-14. This clone was tested in-house and does not work on formalin fixed paraffin-embedded (FFPE) tissue. The Ultra-LEAF™ purified antibody (Endotoxin < 0.01 EU/µg, Azide-Free, 0.2 µm filtered) is recommended for functional assays (Cat. No. 301233 & 301234).

Application References

(PubMed link indicates BioLegend citation)
  1. Knapp W, et al. 1989. Leucocyte Typing IV. Oxford University Press New York.
  2. Leite F, et al. 2002. Infec. Immun. 70:4336.
  3. Jiang Y, et al. 2005. Clin. Hemorheol. Microcircul. 32:261.
  4. BTchard D, et al. 2001. J. Immunol. 167:3099.
  5. Sithu SD, et al. 2007. J. Biol. Chem. doi:10.1074/jbc.M611273200.
  6. Choi EY, et al. 2008. Blood 111:3607. PubMed
  7. Yoshino N, et al. 2000. Exp. Anim. (Tokyo) 49:97. (FC)
  8. Ma Q, et al. 2002. J. Biol. Chem. 277:10638.
Product Citations
  1. Kyei S, et al. 2016. MBio. 7: e00878-16. PubMed
AB_2563261 (BioLegend Cat. No. 301222)

Antigen Details

Integrin, type I transmembrane glycoprotein, noncovalently linked with integrin β2 (CD18) forms LFA-1, 170-180 kD


Adhesion, costimulation
ICAM-1(CD54), ICAM-2(CD102), ICAM-3(CD50)
Cell Type
Leukocytes, Tregs
Biology Area
Cell Adhesion, Cell Biology, Costimulatory Molecules, Immunology, Innate Immunity, Neuroinflammation, Neuroscience
Molecular Family
Adhesion Molecules, CD Molecules
Antigen References

1. Lub M, et al. 1995. Immunol. Today 16:479.
2. Parsons J. 1996. Curr. Opin. Cell Biol. 8:146.

Gene ID
3683 View all products for this Gene ID
View information about CD11a on

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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.

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