Is FITC pH sensitive?
Sophia Dalton Is FITC pH sensitive?
Most commercially available fluorophores are insensitive to pH. As expected, fluorescein, i.e. FITC-dextran, proved to be the most sensitive to pH, exhibiting more than a 95% decrease in fluorescence intensity as the pH was decreased from 10 to 3.
What is the pH of fluorescein?
In the pH range of existence of the fluorescein monoanion (at about pH 5.5), the fluorescence spectrum isessentially the same as that of the neutral molecule (with a slight contribution of dianion emission).
What is the color of FITC?
green
FITC exhibits an excitation maximum at λ = 495 nm and emission maximum at approximately λ = 519 nm. The color of the compound is yellow while the emitted light is green.
Is fluorescein the same as FITC?
Fluorescein isothiocyanate (FITC) is a derivative of fluorescein used in wide-ranging applications including flow cytometry. FITC has excitation and emission spectrum peak wavelengths of approximately 495 nm and 519 nm, giving it a green color. Like most fluorochromes, it is prone to photobleaching.
What is FITC dextran?
Fluorescein isothiocyanate–dextran (FITC-Dextran 4) is use as a fluorescent probe to study cell permeability. FITC-Dextran 4 is used with to study permeability of epithelial cell such as intestinal and renal cells in vivo.
Is FITC same as 488?
High-performance alternatives to fluorescein The Invitrogen Molecular Probes Alexa Fluor 488 dye—with spectral properties and quantum yield nearly identical to those of fluorescein isothiocyanate (FITC)—produces brighter, more photostable conjugates.
What is FITC stain?
Fluorescein-5-isothiocyanate (FITC) is a fluorescence dye and belongs to the xanthene dyes. FITC is used for labeling of different biomolecules, e.g. immunoglobulins, lectins and other proteins, peptides, nucleic acids, nucleotides; oligo-and polysaccha- rides.
What is the color spectrum of FITC fluorescein?
FITC/Fluorescein. The blue color spectrum is 450-495 nm, and the green spectrum is 495-570 nm. Fluorescein isothiocyanate (FITC) is the derivative of fluorescein with an isothiocyanate reactive group, rendering it reactive towards amine and sulfhydryl groups commonly found in biomolecules.
How can I~ of fluorescein at different pHs be determined?
Fluorescence quantum yields I~ of fluorescein at different pH were determined by spectrofluorimetiy (except those in 50 M H2S04), by comparison with that [6] (cb~ = 0.93) of fluorescein at pH 12.
What does FITC stand for?
The Invitrogen Molecular Probes Alexa Fluor 488 dye —with spectral properties and quantum yield nearly identical to those of fluorescein isothiocyanate (FITC)—produces brighter, more photostable conjugates.
Is there a validated antibody database for FITC antibodies?
A comprehensive review of FITC/fluorescein and its applications in biomedical research. A summary of anti-FITC antibodies cited among the over 60,000 formal publications in Labome’s Validated Antibody Database is also presented.
