Fluorometry Readout
Fluorometry Readout - Related Videos
09:24
Voltage-clamp Fluorometry in Xenopus Oocytes Using Fluorescent Unnatural Amino Acids
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Cited by 13 •
2017
This article describes an enhancement of conventional Voltage-Clamp Fluorometry (VCF) where Fluorescent Unnatural Amino Acids (fUAA) are used instead of maleimide dyes, to probe structural rearrangements in ion channels. The procedure includes Xenopus oocyte DNA injection, RNA/fUAA coinjection, and simultaneous current and fluorescence measurements.
19:26
Measuring Intracellular Ca2+ Changes in Human Sperm using Four Techniques: Conventional Fluorometry, Stopped Flow Fluorometry, Flow Cytometry and Single Cell Imaging
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Cited by 30 •
2013
Intracellular Ca2+ dynamics are very important in sperm physiology and Ca2+-sensitive fluorescent dyes constitute a versatile tool to study them. Population experiments (fluorometry and stopped flow fluorometry) and single cell experiments (flow cytometry and single cell imaging) are used to track spatio-temporal [Ca2+] changes in human sperm cells.
06:55
Simple Bulk Readout of Digital Nucleic Acid Quantification Assays
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Cited by 5 •
2015
We describe an endpoint digital assay for quantifying nucleic acids with a simplified (analog) readout. We measure bulk fluorescence of droplet-based digital assays using a standard qPCR machine rather than specialized instrumentation and confirm our results by microscopy.
11:30
A Molecular Readout of Long-term Olfactory Adaptation in C. elegans
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Cited by 2 •
2012
Here we describe a molecular readout of long-term olfactory adaptation in Caenorhabditis elegans. The Protein Kinase G, EGL-4, is necessary for stable adaptation responses in the primary sensory neuron pair called AWC. During prolonged odor exposure EGL-4 translocates from the cytosol to nucleus of the AWC.
09:09
High Throughput, Real-time, Dual-readout Testing of Intracellular Antimicrobial Activity and Eukaryotic Cell Cytotoxicity
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Cited by 5 •
2016
A high throughput, real-time assay was developed to simultaneously identify (1) eukaryotic cell-penetrant antimicrobials targeting an intracellular bacterial pathogen, and (2) assess eukaryotic cell cytotoxicity. A variation on the same technology was thereafter combined with digital dispensing technology to enable facile, high-resolution, dose-response, and two- and three-dimensional synergy studies.
FAQs
The readout depends on pairing an excitation wavelength with measurement of emitted light at a longer wavelength. Signal intensity can then be related to fluorophore abundance, provided the measurement conditions remain controlled. This relationship allows investigators to distinguish changes in fluorescent signal from differences caused by inconsistent analytical conditions when comparing samples or experimental groups.
Fluorophore abundance is not interpreted in isolation; the signal must be considered under controlled conditions. Consistent excitation and emission measurements support comparisons, while changes in measured intensity can indicate differences in the amount or activity represented by the assay. This is especially important when datasets are used to compare experimental conditions or evaluate responses.
Fluorescence measurements can support assays for antibodies, antigens, nucleic acids, immune-cell responses, and pathogen-associated activity. The measured signal therefore may represent the presence or amount of a target, or reflect activity captured by the assay design. This range makes the approach relevant to both host-response studies and investigations of infectious agents.
A practical workflow links the biological assay to a selected excitation wavelength and a measurement of emitted light at a longer wavelength. Researchers then examine signal intensity under controlled conditions and compare the resulting values across samples or experimental groups. This workflow converts assay-associated fluorescence into data that can support quantitative comparisons and response assessment.
The approach is useful when researchers need sensitive, scalable measurements across multiple samples or experimental conditions. In immunology and infection studies, it can help examine antibodies, antigens, nucleic acids, immune-cell responses, or pathogen-associated activity. Its value lies in producing comparable fluorescent data for studying host-pathogen interactions and evaluating changes linked to an experimental condition.
Fluorescent measurements can provide data for assessing diagnostic responses and therapeutic responses, while also supporting comparisons between experimental conditions. Depending on the assay, the readout may track a target's presence, amount, or activity. In infection and immune studies, these results can help relate assay signals to host-pathogen interactions or response patterns without relying on a single biological target.