PlasMem Bright Red


∼ Features ~
– Applicable to live cells and fixation after staining
– High retentivity of reagents with low toxicity
– Just add reagents into medium

Content: 100 µL x 1
Storage Condition: Store at -20oC
Shipping Condition: Ambient Temperature


Mix and match products can be applied.
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・Summer 21-2 (for buying 2)
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(Can not be combined with any other offer or special pricing products.)
Detection Principle

The plasma membrane (PM), consists of a lipid bilayer separating the intracellular environment from the extracellular space. Consequently, the PM plays a central role in many cell behaviors, such as cell migration, cell stretching, and signaling cascades. Additionally, PM dysfunction is an important biomarker because it is related to the cell status and is linked to many diseases.

Dojindo’s PlasMem Bright dyes overcome these limitations. PlasMem Bright dyes are designed to stain PMs for over a day. Furthermore, the PlasMem Bright dyes are more water-soluble compared with other commercially available dyes and can be diluted with culture medium. The PlasMem Bright dyes offer two different color options (green and red) and are provided as ready-to-use DMSO solutions. A working solution can be prepared easily via a single dilution step using growth medium or HBSS.

For more information on PlasMem Bright Dyes, please refer to the publication below:
Takahashi, M. et al., “Amphipathic Fluorescent Dyes for Sensitive and Long-Term Monitoring of Plasma MembranesbioRxiv, 2020, doi:

The general number of usable assays per 100 ul
35 mm dish x 10
μ-Slide 8 well x 10

Low toxicity, No washing, and High retentivity

PlasMem Bright series solves the most frequently requested dissatisfaction with existing dyes

High retentivity on plasma membrane

HeLa cells stained with each plasma membrane staining reagent were incubated for 24 hrs and each the resulting fluorescent image was compared. PlasMem Bright series had higher retentivity on plasma membrane than other products.

PlasMem Bright series had higher retentivity on plasma membrane than other products

Clear visualization of plasma membrane

Observe morphology of neuron (differentiated SH-SY5Y cells) and localization of mitochondria in axon.

PlasMem Bright Series has low cytotoxicity and can be used in observation of morphology of neurons


Experimental Example: Mitochondrial detection in neuroblast (SH-SY5Y cells)

The neuroblasts SH-SY5Y cells were stained with PlasMem Bright Green (green), MitoBright LT Red (red) and Hoechst 33342 (blue), and 3D images were obtained with a confocal fluorescence microscope.

<Detection Condition>
Plasma Membrane (PlasMem Bright Green, green): Ex. 488 nm / Em. 500 – 560 nm
Mitochondria (MitoBright LT Red, red): Ex. 561 nm / Em. 560 – 620 nm
Nuclear (Hoechst 33342, blue): Ex. 405 nm / Em. 400 – 450 nm

(1) Wash SH-SY5Y cells with HBSS
(2) Add PlasMem Bright Green (diluted 200 times), Hoechst 33342 (final concentration: 5 µg / ml) and MitoBright LT Red (final concentration: 0.1 µmol / l) prepared in the medium.
(3) Incubate for 10 minutes
(4) Wash the cells twice with HBSS
(5) Observation with a fluorescence microscope

Experimental example: Observation of temperature-dependent changes in endocytosis using suspension cells

The temperature-dependent changes in endocytosis of Jurkat cells were visualized using ECGreen-Endocytosis Detection (product code: E296) and PlasMem Bright Red.

<Detection Condition>
Endosomes (ECGreen, green): Ex. 405 nm / Em. 500 – 560 nm
Plasma membrane (PlasMem Bright Red, red): Ex. 561 nm / Em. 560 – 700 nm

(1) Add Jurkat cell suspension (10% FBS, RPMI) in a sample tube and incubate at 4oC or 37oC for 30 min.
(2) Dilute the ECGreen solution 1,000-fold with the suspension from (1).
(3) Incubate at 4oC or 37oC for 30 min.
(4) Wash the cells twice with HBSS.
(5) Add medium containing PlasMem Bright Red (100-fold dilution) and suspend the cells.
(6) Transfer the suspension to an imaging plate and observe the cells under a confocal microscope.

Experimental Example: Co-staining with exosomes

HeLa cells stained with PlasMem Bright Green were added with exosomes stained with the ExoSparkler Exosome Membrane labeling Kit-Red, and the uptake of exosomes into the cells was observed.

  • HeLa cells (Live cell)


  • HeLa cells (PFA fixed cells)

<Detection conditions>
Plasma Membrane (PlasMem Bright Green, green): Ex. 488 nm / Em. 500 –560 nm
Exosome (ExoSparkler Exosome Membrane Labeling Kit-Red, red): Ex. 561 nm / Em. 560 –620 nm

(1) HeLa cells and incubate for 24 hours
(2) Remove the supernatant and add PlasMem Bright Green (100-fold dilution) prepared in the medium.
(3) Incubate for 10 minutes
(4) Wash the cells 3 times with HBSS
(5) Add 175 μl of MEM medium and 25 ul of Exosome solution stained with ExoSparkler Exosome Membrane Labeling Kit-Red.
(6) Incubate overnight in a CO2 incubator
(For immobilization) Wash cells twice with HBSS, add 4% PFA, incubate for 15 minutes, then wash cells twice with HBSS
(7) Observed with a confocal laser scanning microscope

Experimental example: Time-lapse imaging of brain-derived mouse neuroblastoma (N1E-115 cells)

Time-lapse imaging of N1E-115 cells stained with PlasMem Bright Green diluted 200-fold in medium for 30 min.

<Detection conditions>
・ Cells: N1E-115 cells (brain-derived mouse neuroblastoma)
・ Medium: 5% FBS, 1% glutamine-containing D-MEM (Low-glucose)
・ Culture equipment: 35 mm glass bottom dish
・ Imaging equipment: Fluorescence microscope with incubator
・ Shooting time: 1 hour, shooting interval: 2 minutes

Data was kindly provided from Dr. K Fukui, Shibaura Institute of Technology.

Excitation and emission spectra of PlasMem Bright dyes

Excitation and emission spectra of PlasMem Bright series

Nuclear (Blue), Mitochondria (Red), Plasma Membrane (Green)

Related Categories

Intracellular Fluorescent Probes Plasma Membrane

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COVID-19 Announcement

Due to rising concerns regarding the COVID-19 (Coronavirus 2019) outbreak, Dojindo Molecular Technologies, Inc will be taking the necessary steps to prioritize public health and safety.

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