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L4655

Sigma-Aldrich

Latex beads, carboxylate-modified polystyrene, fluorescent yellow-green

aqueous suspension, 1.0 μm mean particle size

Sinónimos:

Fluorescent Latex Beads

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1 ML
104,00 €

104,00 €


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1 ML
104,00 €

About This Item

Número MDL:
Código UNSPSC:
12162002
NACRES:
NA.25

104,00 €


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Formulario

aqueous suspension

Nivel de calidad

composición

Solids, 2.5%

técnicas

cell based assay: suitable

tamaño medio de partícula

1.0 μm

fluorescencia

λex ~470 nm; λem ~505 nm

idoneidad

suitable for immunoassay

aplicaciones

cell analysis

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Aplicación

Carboxylate-modified polystyrene latex beads have been used to collect morphofunctional data about the immune systems of Carabus lefebvrei, a helicophagous Italian endemic ground beetle often used as an indicator of the habitat quality of the Apennines mountain forests. Carboxylate-modified polystyrene latex beads have also been used to inform comparative studies on immunity defense mechanisms of adults and larvae of the coleopteran Cetonischema aeruginosa and to investigate the phagocytic activity of cultured rat thyroid cells.
Latex beads, carboxylate-modified polystyrene, fluorescent yellow-green has been used:
  • in epidermal growth factor conjugate preparation for indirect immunofluorescence imaging studies[1]
  • for culturing mouse bronchoalveolar macrophages and human monocyte-derived macrophages prior to phagocytosis imaging studies[2]
  • in coadministration with Salmonella expressed green fluorescent protein (GFP) for confocal microscopy studies and in biofluorescence imaging[3]

Código de clase de almacenamiento

10 - Combustible liquids

Clase de riesgo para el agua (WGK)

WGK 3

Punto de inflamabilidad (°F)

Not applicable

Punto de inflamabilidad (°C)

Not applicable


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Certificados de análisis (COA)

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Libin Huang et al.
Ocular immunology and inflammation, 24(6), 684-692 (2016-12-10)
To evaluate the effect of CX3CL1/CX3CR1 signaling on the interaction between mesenchymal stem cells (MSCs) and retinal microglia. Supernatants of homogenized retina were harvested from light-damaged SD rats (ISHR) to stimulated retinal microglia. Stimulated microglia were cocultured with MSCs, CX3CL1
Elin Silverpil et al.
Inflammation, 34(1), 1-9 (2010-03-27)
There is now substantial evidence that the cytokine interleukin-17 orchestrates the accumulation of neutrophils in mammals and thereby contributes to host defense. However, the role of IL-17 in controlling neutrophil turnover is not fully understood. Here, we demonstrate that IL-17
Po-Tsang Lee et al.
Animals : an open access journal from MDPI, 11(8) (2021-08-28)
We investigated whether phycoerythrin (PE), a pigment sourced from marine algae, could act as an immunomodulatory agent in whiteleg shrimp (Litopenaeus vannamei). To this end, PE was extracted and purified from a PE-rich macroalgae, Colaconema sp. Our in vitro analysis
Bin Fan et al.
Journal of neuroimmunology, 244(1-2), 45-50 (2012-01-21)
Meningothelial cells (MECs) form the innermost layer of the meningeal sheath and as such are in direct contact with the cerebrospinal fluid (CSF) likely influencing CSF composition. The CSF space is a site of active immunological processes. To investigate an
Gal Mor Khalifa et al.
Journal of structural biology, 213(4), 107803-107803 (2021-10-26)
Stony coral exoskeletons build the foundation for the most biologically diverse marine ecosystems on Earth, coral reefs, which face major threats due to many anthropogenic-related stressors. Therefore, understanding coral biomineralization mechanisms is crucial for coral reef management in the coming

Preguntas

1–5 de 5 Preguntas  
  1. What is the concentration of product L4655?

    1 respuesta
    1. The concentration of the Latex Beads is approximately 4.75x10^10 beads/mL.

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  2. What are the ingredients of the solution in which the plastic is diluted? Can I dilute it in PBS?

    1 respuesta
    1. This product is prepared in water containing a prioprietary anionic surfactant and >0.1% Sodium Azide. Phosphate Buffered Saline is a suitable diluent.

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  3. Are there latex beads recommended for phagocytosis, and if so, what size is recommended?

    1 respuesta
    1. There is no performance testing of latex beads for phagocytosis. Information found indicates that internally, there are no specific protocols or recommendations for a phagocytosis method using the listed latex beads. However, references to literature where the products have been used in research are provided. The maximum excitation and emission for one of the latex bead products, L3280, are also mentioned. Additionally, three products (catalog numbers 59769, 43302, and 89904) were found on the company website, with variations in bead size and fluorescence. For more details, you may refer to the provided links and Knowledge Article 000007596.

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  4. What are the differences between carboxylate-modified polystyrene and amine-modified polystyrene Latex beads, and which type of beads is suitable for phagocytosis applications?

    1 respuesta
    1. When selecting beads for phagocytosis assays, there are three key parameters to consider: the size of the bead, the color of the bead (dyed or undyed), and the modification of the bead (carboxylate, amine, or sulfate modified).

      Beads chosen for phagocytosis experiments typically range from approximately 0.5 to 3 micrometers in size. A 1:250 dilution of the beads into the culture medium is commonly used for phagocytosis experiments. Latex Beads, 2 um (Product No. L0905), can be utilized for phagocytosis assays, as macrophages can phagocytose particles larger than 2 um.

      Fluorescent latex beads are available with different fluorescent dyes incorporated into the beads. The yellow-green beads are commonly used for phagocytosis studies and are compatible with most flow cytometers and fluorescent microscopes.

      For phagocytosis applications, the choice of bead modification (carboxylate vs. amine) depends on the specific assay being conducted. Carboxylate-modified beads, with a negative charge, mimic the uptake of apoptotic cells, while amine-modified beads, with a positive charge, are used to mimic the uptake of opsonized cells.

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  5. What is the recommended storage temperature?

    1 respuesta
    1. This product may be stored at room temperature. For products with no specified storage temperature given on the label or product page, ambient storage may be assumed. Products that require controlled temperature storage, such as refrigeration or freezer conditions, storage temperatures are published on the product label, Certificate of Analysis, the Safety Data Sheet (SDS).

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