iFluor® 405–dextran conjugate (average MW = ~20K)
Product key features
- Fluorophore: Conjugated to iFluor® 405, a highly photostable blue-emitting dye with spectral characteristics similar to Pacific Blue® (Ex/Em: ~403/427 nm).
- Polymer Carrier: ~20,000 Da dextran backbone provides increased hydrodynamic size and reduced cellular uptake, enabling applications in extracellular diffusion and vascular permeability studies.
- Spectral Compatibility: Optimized for 405 nm laser excitation; compatible with standard flow cytometry and fluorescence microscopy platforms.
- Solubility and Handling: Supplied as a lyophilized powder; easily reconstituted in aqueous buffers for use in biological systems.
- Experimental Applications: Ideal for tracing macromolecular transport, monitoring extracellular matrix diffusion, and performing fluid-phase endocytosis assays.
Product description
iFluor® 405–dextran conjugate (average molecular weight ~20,000 Da) is a water-soluble fluorescent probe composed of a 20 kDa dextran polymer covalently labeled with iFluor® 405, a bright blue-emitting fluorophore with excitation and emission maxima at ~403 nm and ~427 nm, respectively. The 20 kDa dextran backbone offers an extended hydrodynamic radius and slower diffusion properties, making it particularly suitable for studies involving macromolecular transport, extracellular diffusion, and vascular permeability. Its larger size compared to 10 kDa dextran enhances retention within extracellular spaces and limits rapid cellular uptake, facilitating its use as an extracellular tracer.
iFluor® 405 is spectrally similar to Pacific Blue® and is well-suited for detection with 405 nm excitation sources commonly available on flow cytometers and fluorescence microscopes. The conjugate demonstrates high photostability, minimal nonspecific binding, and low autofluorescence interference, making it ideal for quantitative and imaging-based applications. Supplied as a lyophilized powder, it can be readily reconstituted in aqueous buffers for use in live-cell imaging, tracer diffusion studies, endocytosis assays, and permeability measurements.
Spectrum
Product family
Name | Excitation (nm) | Emission (nm) | Extinction coefficient (cm -1 M -1) | Quantum yield | Correction Factor (260 nm) | Correction Factor (280 nm) |
iFluor® 405–dextran conjugate (average MW = ~10K) | 403 | 427 | 370001 | 0.911 | 0.48 | 0.77 |
iFluor® 405–dextran conjugate (average MW = ~150K) | 403 | 427 | 370001 | 0.911 | 0.48 | 0.77 |
iFluor® 405–dextran conjugate (average MW = ~70K) | 403 | 427 | 370001 | 0.911 | 0.48 | 0.77 |
iFluor® 647–dextran conjugate (average MW = ~20K) | 656 | 670 | 2500001 | 0.251 | 0.03 | 0.03 |
References
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