What is the purpose of fluorescence polarization?
Fluorescence polarization (FP) is a homogeneous method that allows rapid and quantitative analysis of diverse molecular interactions and enzyme activities.
How do you measure fluorescence polarization?
Fluorescence polarization is then measured as the difference of the emission light intensity parallel (I||) and perpendicular (I⊥) to the excitation light plane normalized by the total fluorescence emission intensity.
How accurate is fluorescence spectroscopy?
Fluorescence spectroscopy is a relevant analytical technique because of its extreme sensitivity and excellent specificity. Indeed, spectrofluorometric methods can detect concentration of component as low as one part in 1010, with its sensitivity 1000 times greater than that of most spectrophotometric methods.
What are the basic information obtained from fluorescence correlation spectroscopy experiments?
Fluorescence Correlation Spectroscopy (FCS) is a correlation analysis of temporal fluctuations of the fluorescence intensity. It offers insights into the photophysics that cause these characteristic fluorescence intensity fluctuations as well as diffusion behaviour and absolute concentrations of detected particles.
What is a fluorescence polarization immunoassay?
Fluorescence polarization immunoassays were first developed in the 1970s, and are based on measuring the polarization of light caused by changes in molecular size as a result of antigen-antibody reactions. The technology has long been used in human clinical applications.
Why validate the fluorescence polarization assay for Brucella abortusin?
The purpose of this validation is to determine the fitness of the fluorescence polarization (FP) diagnostic assay in diagnosing Brucella abortusin cattle, swine and bison. A validated assay should consistently provide test results that accurately predict the infection status of animals with some predetermined degree of statistical certainty.
What is the history of fluorescence polarization?
Fluorescence polarization was first observed by F. Weigert in 1920. He experimented with solutions of fluorescein, eosin, and other dyes at various temperatures and viscosities.
How does temperature and viscosity affect fluorescence polarization?
Operating under fixed temperature and viscosity allows for the fluorescence polarization to be directly proportional to the size of the fluorophore. Free tracer in solution has a lower fluorescence polarization than antibody -bound tracer with slower Brownian motion.