5-Dodecanoylaminofluorescein di-β-D-Galactopyranoside | CAS 138777-25-0

5-Dodecanoylaminofluorescein di-β-D-Galactopyranoside is a fluorescein-based, glycosylated substrate designed for fluorescence readouts in β-galactosidase-related workflows. The di-β-D-galactopyranoside motif supports enzymatic processing that generates a fluorescent fluorescein signal, while the dodecanoylamino substituent helps drive practical performance in membrane-associated or cell-mimicking assay formats where hydrophobic association can improve signal development. Researchers use this reagent as a sensitive fluorescence reporter to monitor β-galactosidase activity in biochemical assays and cell-based reporter systems.

1. β-Galactosidase Activity Assays

5-Dodecanoylaminofluorescein di-β-D-Galactopyranoside is widely used in plate-based fluorescence assays to quantify β-galactosidase activity in enzyme preparations and expression lysates. The reagent's fluorescein output enables straightforward kinetic monitoring using standard fluorescence plate readers, supporting routine assay development for substrate screening, expression optimization, and comparative evaluation of β-galactosidase variants or assay conditions. In these workflows, signal generation is tied to enzymatic conversion of the glycosylated fluorescein precursor to a fluorescent product, making it a practical choice for activity-focused studies rather than endpoint staining.

2. Cell Reporter Readouts

5-Dodecanoylaminofluorescein di-β-D-Galactopyranoside is commonly applied in cell-based reporter assays where β-galactosidase activity serves as a functional readout of gene expression or promoter activity. Because the reagent combines a fluorescein fluorophore with a membrane-associating dodecanoylamino component, it is often selected for experiments where substrate uptake or local enrichment near the enzyme improves the reproducibility of fluorescence signal development. Lab teams use it for fluorescence microscopy and plate assays to visualize and quantify reporter activity in cultured cells expressing β-galactosidase.

3. Fluorescence Microscopy Imaging

5-Dodecanoylaminofluorescein di-β-D-Galactopyranoside supports fluorescence imaging workflows that map β-galactosidase activity in spatially resolved samples. Researchers use it to generate intracellular or compartment-associated fluorescence patterns that reflect where enzymatic processing occurs, enabling qualitative localization alongside quantitative analysis of fluorescence intensity. This makes the reagent useful for mechanistic studies of reporter expression, imaging-based optimization of assay timing, and comparative visualization of β-galactosidase activity under different experimental treatments.

4. Enzyme Kinetics Development

5-Dodecanoylaminofluorescein di-β-D-Galactopyranoside is frequently used during assay development to establish substrate concentration and timing windows for reliable kinetic measurements of β-galactosidase. The fluorescein-based signal allows continuous monitoring, which is helpful for determining linear response ranges and selecting appropriate readout intervals for downstream experiments. In enzymology and chemical biology research, this reagent is used to build robust activity assays that can be adapted to different formats, including microplate kinetics and imaging-compatible time courses.

5. High-Throughput Screening Support

5-Dodecanoylaminofluorescein di-β-D-Galactopyranoside is used as a fluorescence reporter substrate in high-throughput screening workflows aimed at identifying modulators of β-galactosidase activity. Assay developers rely on the conversion-linked fluorescein output to generate measurable signals in multiwell formats, supporting automated liquid handling and standardized plate reading. This reagent is particularly useful when the screening campaign requires a practical, enzyme-activity-driven fluorescence readout that integrates cleanly into existing fluorescence instrumentation and plate-based data analysis pipelines.