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Vybrant® Phagocytosis Assay Kit

Catalog number: V6694

Molecular Probes™  Related applications: Cell Viability, Proliferation & Function | Cellular Imaging | Pharma & Biopharma | Target-Based ADME⁄Tox Assays

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The Vybrant® Phagocytosis Assay Kit provides a way for researchers to observe and quantitate the process of phagocytosis in human polynuclear cells and mouse macrophages by following the internalization of a foreign particle—in this case killed E. coli (K-12 strain) cells that have been labeled with the fluorescent dye fluorescein. In addition to the lyophilized E. coli BioParticles® component, the kit contains a trypan blue solution (to quench the fluorescence from particles that were not internalized) as well as step-by-step instructions for performing this phagocytosis assay in a fluorescence microplate reader. The methodology used with this kit has been developed using an adherent murine macrophage cell line (J774); however, by modifying the cell culture conditions, researchers can adapt this phagocytosis assay to other adherent cell lines.

Vybrant® Phagocytosis Assay Kit Specifications:
• Particles are fluorescein-labeled E. coli (K-12 strain)
• Kit supplies sufficient reagents for ~250 tests using 96-well plates
• Fluorescence is measured using a microplate reader (Ex/Em ~480/520 nm)

Find More BioParticles® Products
We offer a large range of dye-labeled and unlabeled E. coli (K-12 strain), S. aureus (Wood strain, without protein A), and zymosan (S. cerevisiae) BioParticles® products. Find out about these products and their applications by reviewing Probes for Following Receptor Binding and Phagocytosis—Section 16.1 in the Molecular Probes® Handbook.

For pH-sensitive endocytosis assays, see our pHrodo™ BioParticles® conjugates.

For Research Use Only. Not for human or animal therapeutic or diagnostic use.
For Research Use Only. Not for use in diagnostic procedures.


Format: 96-well plate
Species: E. coli
Label or Dye: FITC (Fluorescein)
Product Size: 1 kit
Detection Method: Fluorescent
For Use With (Equipment): Microplate Reader, Fluorescence Microscope
Shipping Condition: Room Temperature

Contents & storage

Store in freezer (-5 to -30°C) and protect from light.


Manuals & protocols

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