Alexa Fluor® 647 anti-mouse CD64 (FcγRI) Antibody

Product Details

Verified Reactivity

Mouse

Antibody Type

Monoclonal

Host Species

Mouse

Immunogen

BALB/c mouse FcγRI-human IgG Fc fusion protein.

Formulation

Phosphate-buffered solution, pH 7.2, containing 0.09% sodium azide.

Preparation

The antibody was purified by affinity chromatography and conjugated with Alexa Fluor® 647 under optimal conditions.

Concentration

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.

Application

FC - Quality tested
SB - Reported in the literature, not verified in house

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 ≤0.5 µg per million cells in 100 µl volume. It is recommended that the reagent be titrated for optimal performance for each application.

* Alexa Fluor® 647 has a maximum emission of 668 nm when it is excited at 633 nm / 635 nm.

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

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Excitation Laser

Red Laser (633 nm)

Application Notes

The X54-5/7.1 antibody reacts with mouse strains carrying CD64a and b alleles but not CD64d. X54-5/7.1 recognizes a conformational determinant formed between domains 2 and 3. Additional reported application (for relevant formats) include: immunoprecipitation¹, and spatial biology (IBEX)^5,6. Clone X54-5/7.1 is not found to be useful for Western blots¹.

Additional Product Notes

Iterative Bleaching Extended multi-pleXity (IBEX) is a fluorescent imaging technique capable of highly-multiplexed spatial analysis. The method relies on cyclical bleaching of panels of fluorescent antibodies in order to image and analyze many markers over multiple cycles of staining, imaging, and, bleaching. It is a community-developed open-access method developed by the Center for Advanced Tissue Imaging (CAT-I) in the National Institute of Allergy and Infectious Diseases (NIAID, NIH).

Application References

(PubMed link indicates BioLegend citation)

1. Tan PS, et al. 2003. J. Immunol. 170:2549. (IP)
2. Ingersoll MA, et al. 2010. Blood 115:e10. (FC)
3. Ozeri E, et al. 2012. J. Immunol. 189:146. PubMed
4. Richardson ML, et al. 2014. PLoS Negl Trop Dis. 8:2825. PubMed
5. Radtke AJ, et al. 2020. Proc Natl Acad Sci U S A. 117:33455-65. (SB) PubMed
6. Radtke AJ, et al. 2022. Nat Protoc. 17:378-401. (SB) PubMed

Product Citations

1. Peterson EJ, et al. 2019. Mol Syst Biol. 15:e8584. PubMed
2. Sierro F, et al. 2017. Immunity. 47:374. PubMed
3. Ahmed A, et al. 2023. Mol Oncol. 1545:17. PubMed
4. Sepe JJ, et al. 2022. JACC Basic Transl Sci. 7:915. PubMed
5. Wieghofer P, et al. 2021. EMBO J. 40:e105123. PubMed
6. Ferrer-Font L, et al. 2020. Elife. 9:. PubMed

RRID

AB_2566560 (BioLegend Cat. No. 139321)
AB_2566560 (BioLegend Cat. No. 139322)

Antigen Details

Structure

Ig superfamily, type I glycoprotein, 72 kD

Distribution

Monocytes, macrophages, mast cells, dendritic cells

Function

Phagocytosis, ADCC

Ligand/Receptor

IgG

Cell Type

Dendritic cells, Macrophages, Mast cells, Monocytes

Biology Area

Immunology, Innate Immunity

Molecular Family

CD Molecules, Fc Receptors

Gene ID

14129 View all products for this Gene ID

UniProt

View information about CD64 on UniProt.org

Documentation

• Technical Data Sheet (pdf)
• Certificate of Analysis
• Safety Data Sheet

Reviews

Related Protocols

• Cell Surface Flow Cytometry Staining Protocol

Related Pages & Pathways

Related FAQs

If an antibody clone has been previously successfully used in IBEX in one fluorescent format, will other antibody formats work as well?

It’s likely that other fluorophore conjugates to the same antibody clone will also be compatible with IBEX using the same sample fixation procedure. Ultimately a directly conjugated antibody’s utility in fluorescent imaging and IBEX may be specific to the sample and microscope being used in the experiment. Some antibody clone conjugates may perform better than others due to performance differences in non-specific binding, fluorophore brightness, and other biochemical properties unique to that conjugate.

Will antibodies my lab is already using for fluorescent or chromogenic IHC work in IBEX?

Fundamentally, IBEX as a technique that works much in the same way as single antibody panels or single marker IF/IHC. If you’re already successfully using an antibody clone on a sample of interest, it is likely that clone will have utility in IBEX. It is expected some optimization and testing of different antibody fluorophore conjugates will be required to find a suitable format; however, legacy microscopy techniques like chromogenic IHC on fixed or frozen tissue is an excellent place to start looking for useful antibodies.

Are other fluorophores compatible with IBEX?

Over 18 fluorescent formats have been screened for use in IBEX, however, it is likely that other fluorophores are able to be rapidly bleached in IBEX. If a fluorophore format is already suitable for your imaging platform it can be tested for compatibility in IBEX.

The same antibody works in one tissue type but not another. What is happening?

Differences in tissue properties may impact both the ability of an antibody to bind its target specifically and impact the ability of a specific fluorophore conjugate to overcome the background fluorescent signal in a given tissue. Secondary stains, as well as testing multiple fluorescent conjugates of the same clone, may help to troubleshoot challenging targets or tissues. Using a reference control tissue may also give confidence in the specificity of your staining.

How can I be sure the staining I’m seeing in my tissue is real?

In general, best practices for validating an antibody in traditional chromogenic or fluorescent IHC are applicable to IBEX. Please reference the Nature Methods review on antibody based multiplexed imaging for resources on validating antibodies for IBEX.

Other Formats

Certificate of Analysis