Fluorometric Enzymatic Method
Fluorometric Enzymatic Method - Related Videos
07:29
Cell-free Biochemical Fluorometric Enzymatic Assay for High-throughput Measurement of Lipid Peroxidation in High Density Lipoprotein
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Cited by 15 •
2017
We describe here a fluorometric cell-free biochemical assay for determination of HDL-lipid peroxidation. This rapid and reproducible assay can be used to determine HDL function in large scale studies and can contribute to our understanding of HDL function in human disease.
04:57
Chromatin Shearing: A Method to Generate Chromatin Fragments Using Enzymatic Digestion
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2023
This video describes the protocol for chromatin shearing using micrococcal nuclease enzymatic digestion. Chromatin shearing is an essential step in Chromatin immunoprecipitation or ChIp workflow, which helps investigate protein-DNA interaction in human chronic myeloid leukemia cells. In the feature protocol chromatin shearing is performed using sonication.
09:58
Light-driven Enzymatic Decarboxylation
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Cited by 6 •
2016
We describe a protocol for the light-catalyzed generation of hydrogen peroxide — a cofactor for oxidative transformations.
07:21
Pancreatic Islets Isolation through Collagenase Perfusion: An Enzymatic Method to Isolate Pancreatic Islet Cells
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2023
Pancreatic islets, also called the Islets of Langerhans, are a cluster of endocrine cells which produces hormones for glucose regulation and other important biological functions. This protocol explains a method for isolating pancreatic islets by first perfusing collagenase via Ampulla of Vater to digest the exocrine pancreatic tissue and a simplified density gradient centrifugation to purify the islets from mice.
08:05
Multiplexed Fluorometric ImmunoAssay Testing Methodology and Troubleshooting
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Cited by 19 •
2011
Using Luminex Corporation’s xMAP microsphere technology, we have developed the Multiplexed Fluorometric ImmunoAssay (MFIA) for serosurveillance of various laboratory animal species. The MFIA is a suspension microarray where antigen, tissue control or immunoglobulins are covalently linked to color-coded polystyrene microspheres. The MFIA testing method as well as various troubleshooting topics is addressed.
FAQs
The measured fluorescence may represent reaction progress when an enzyme converts a fluorogenic substrate into a fluorescent product. Alternatively, the assay can track a change in fluorescence from a labeled compound associated with the target. Interpreting the result therefore depends on whether fluorescence reflects catalytic activity, the amount of an analyte, or the behavior of a labeled component.
Fluorescence provides sensitive quantitative information from biological samples, allowing researchers to examine targets present at low abundance. This sensitivity is particularly valuable when enzyme activity, microbial components, or immune-associated enzymes are difficult to assess by less responsive measurements. It also supports comparisons of biological responses across samples when the fluorescent signal is measured under controlled conditions.
The relationship depends on how the enzyme or labeled compound changes during the assay. Product formation can indicate reaction progress, whereas a fluorescence change linked to a target can provide information about analyte concentration. Measurements must be interpreted under controlled conditions so that differences in emitted signal can be meaningfully connected to the biological quantity or activity being examined.
A typical workflow combines the biological sample with a fluorogenic substrate or a labeled compound, allows the relevant enzymatic or target-associated change to occur, and measures the resulting emitted fluorescence. The signal is then related to reaction progress or analyte concentration. This sequence enables quantitative analysis while preserving the distinction between activity-based and abundance-based measurements.
The technique is useful when investigators need sensitive measurements of enzyme-linked assay signals, microbial components, or enzymes associated with immune responses. It can reveal differences among biological samples and support analysis of responses that involve low-abundance targets. Its value lies in connecting fluorescence measurements with infection-related or immune-associated biochemical changes.
These measurements can provide quantitative comparisons of enzyme activity, target abundance, or biological response, depending on the assay design. A change in emitted fluorescence may indicate different reaction progress or differing amounts of a target-associated signal. In infection and immunology studies, such comparisons help evaluate variation in microbial detection or immune-associated enzyme responses among samples.