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LysoBrite™ Red
Lysosomes are cellular organelles which contain acid hydrolase enzymes to break up waste materials and cellular debris. Lysosomes digest excess or worn-out organelles, food particles, and engulfed viruses or bacteria. The membrane around a lysosome allows the digestive enzymes to work at pH 4.5. The interior of the lysosomes is acidic (pH 4.5-4.8) compared to the slightly alkaline cytosol (pH 7.2). The lysosome maintains this pH differential by pumping protons from the cytosol across the membrane via proton pumps and chloride ion channels. LysoBrite™ Red selectively accumulates in lysosomes probably via the lysosome pH gradient. The lysotropic indicator is a hydrophobic compound that easily permeates intact live cells, and trapped in lysosomes after it gets into cells. Its fluorescence is significantly enhanced upon entering lysosomes. This key feature significantly reduces its staining background and makes it useful for a variety of studies, including cell adhesion, chemotaxis, multidrug resistance, cell viability, apoptosis and cytotoxicity. It is suitable for proliferating and non-proliferating cells, and can be used for both suspension and adherent cells. LysoBrite™ dyes significantly outperform the equivalent LysoTracker ™dyes (from Invitrogen). LysoBrite™ dyes can stay in live cells for more than a week with very minimal cell toxicity while the LysoTracker dyes can only be used for a few hours. LysoBrite™ dyes can survive a few generations of cell division. In addition, LysoBrite™ dyes are much more photostable than the LysoTracker dyes.
Time-lapse super-resolution fluorescence imaging of live COS-7 cells stained with MitoLite™ Green FM and LysoBrite™ Red. Live COS-7 cells were labeled with MitoLite™ Green FM (Cat. #22695) for mitochondrial staining and LysoBrite™ Red (Cat. #22645) for lysosomal staining. Images were acquired using the CSR Biotech MI-SIM super-resolution microscopy system and reconstructed using standard Wiener reconstruction. The merged sequence shows mitochondria in green and lysosomes in red.

Data credit: Data was generated by CSR Biotech using their MI-SIM microscopy system with MitoLite™ Green FM and LysoBrite™ Red from AAT Bioquest.
CatalogSize
Price
Quantity
22645500 Tests
Price
 
Physical properties

Molecular weight698.94
SolventDMSO
Spectral properties

Excitation (nm)576
Emission (nm)596
Usage and storage

Intended useResearch Use Only (RUO)
StorageFreeze (< -15 °C); Minimize light exposure
Instrument settings

Flow cytometer
Excitation532/561 nm laser
Emission585/40 nm filter

Fluorescence microscope
ExcitationTRITC filter set
EmissionTRITC filter set
Recommended plateBlack wall/clear bottom
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Page updated on July 26, 2026