Fura Red
Fura Red is a Ca2+-sensitive fluorescent dye, which decreases in fluorescence with rising [Ca2+].
For research use only. We do not sell to patients.
- CAS No.: 149732-62-7
- Formula: C41H44N4O20S
- Molecular Weight:944.87
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Storage:
Please store the product under the recommended conditions in the Certificate of Analysis.
Biological Activity
Description
In Vitro
Guide[2] (Following is our recommended protocol. This protocol only provides a guideline, and should be modified according to your specific needs).
Labeling of Cells:
1. Resuspend the cells in Hanks' Balanced Salt Solution (HBSS), add 1 μM Fura Red AM, supplement with 0.01% Pluronic F127 unless otherwise stated, and incubate in a 37°C water bath for 30 minutes.
2. Wash the cells in HEPES-buffered salt solution (HBSS) containing 1 mmol/L calcium chloride, 0.5 mmol/L magnesium chloride, 0.1% bovine serum albumin, and 10 mmol/L HEPES, then resuspend them in the same HEPES-buffered salt solution supplemented with the vital dye SYTOX Green.
3. Equilibrate the cells in a 37°C water bath for at least 10 minutes.
4. Analyze the samples on a flow cytometer, fluorescence microscope, or fluorescence microplate reader. Ratiometric analysis of Fura Red is performed by excitation with a violet laser (406 nm) and a green laser (502 nm).
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only. Further protocols information, click here.
Emission (Em)
652
Excitation (Ex)
471
Chemical Information
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CAS No. 149732-62-7
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Molecular Weight 944.87
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Formula C41H44N4O20S
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SMILES
O=C(OCOC(C)=O)CN(C1=CC(OC(/C=C(C(N2)=O)/NC2=S)=C3)=C3C=C1OCCOC(C=C(C)C=C4)=C4N(CC(OCOC(C)=O)=O)CC(OCOC(C)=O)=O)CC(OCOC(C)=O)=O
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Shipping
Room temperature in continental US; may vary elsewhere.
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Storage
Please store the product under the recommended conditions in the Certificate of Analysis.
Protocols
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Ca2+ Staining Technique
Ca2+ staining is an experimental technique that utilizes specific fluorescent probes (such as Fluo-4 AM, Fura-2, etc.) to qualitatively or quantitatively detect dynamic changes in intracellular Ca2+ concentrations; this is achieved by monitoring the changes in fluorescent signals generated when these probes bind to free intracellular calcium ions. The underlying principle relies primarily on the presence of chelating groups within the probe's molecular structure that possess high affinity for calcium ions.
Purity & Documentation
References
[1]. Floto RA, et al. IgG-induced Ca2+ oscillations in differentiated U937 cells; a study using laser scanning confocal microscopy and co-loaded fluo-3 and fura-red fluorescent probes. Cell Calcium. 1995 Nov;18(5):377-89. [Content Brief]
[2]. Wendt ER, et al. Ratiometric analysis of fura red by flow cytometry: a technique for monitoring intracellular calcium flux in primary cell subsets. PLoS One. 2015 Apr 2;10(3):e0119532. [Content Brief]
Calculators
Concentration (start) × Volume (start) = Concentration (final) × Volume (final)