ATTO 633 DOPE

ATTO 633 DOPE is a fluorescent phospholipid probe designed for membrane incorporation, combining the ATTO 633 fluorophore with a DOPE (dioleoylphosphatidylethanolamine) lipid anchor. Its red far-red emission and hydrophobic lipid tail enable robust labeling of lipid bilayers in model membranes and cell-derived preparations, supporting fluorescence microscopy and quantitative imaging workflows where membrane localization is required.

1. Membrane Fluorescence Labeling

ATTO 633 DOPE is used to visualize and track lipid membranes in supported lipid bilayers, liposomes, and other membrane-mimicking systems. Researchers incorporate the DOPE lipid into bilayers to generate stable membrane-associated fluorescence for imaging experiments that require a fluorophore confined to the membrane plane. This reagent is also commonly selected for studies of membrane organization, lipid mixing, and membrane remodeling in reconstituted systems, where a lipid-conjugated dye provides more faithful membrane localization than non-lipid dyes.

2. Fluorescence Microscopy Imaging

ATTO 633 DOPE supports fluorescence microscopy of membrane structures in fixed or prepared samples where membrane labeling is the primary readout. Imaging teams use it to highlight cell-derived vesicles, extracellular vesicles, and membrane-rich preparations, leveraging the ATTO 633 emission for multicolor experiments with compatible far-red channels. The lipid anchor helps reduce nonspecific staining associated with dyes that do not partition into lipid bilayers, making it a practical choice for cellular imaging workflows focused on membrane morphology and distribution.

3. Flow Cytometry Membrane Staining

ATTO 633 DOPE is applied in flow cytometry workflows that require membrane-associated fluorescence on particle or cell suspensions, such as vesicle analysis and membrane staining of prepared cell populations. By using the DOPE lipid anchor to associate with lipid membranes, the reagent enables robust signal generation tied to membrane presence rather than diffuse cytosolic labeling. This makes it useful for quantitative fluorescence readouts in instrument-based assays where membrane-positive populations need to be distinguished and gated based on far-red fluorescence.

4. Lipid Probe Standards For Assays

ATTO 633 DOPE is also used as a fluorescent lipid reference in assay development and method optimization for membrane labeling. Developers use it to validate staining consistency across batches of liposomes or membrane preparations and to standardize imaging conditions for experiments that compare membrane behavior under different buffer compositions or formulation conditions. In fluorescence-based workflows, the reagent serves as a convenient membrane-tethered ATTO 633 source for establishing practical assay baselines and channel settings.