Atp Level Quantification
Atp Level Quantification - Related Videos
01:31
ATP Yield
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2019
Cellular respiration produces 30 - 32 ATP per glucose molecule. Although most of the ATP results from oxidative phosphorylation and the electron transport chain (ETC), 4 ATP are gained beforehand (2 from glycolysis and 2 from the citric acid cycle). The ETC is embedded in the inner mitochondrial membrane and is comprised of four main protein complexes and an ATP synthase. NADH and FADH2 pass electrons to these complexes, which pump protons into the intermembrane space. This distribution of...
08:32
The ATP Bioluminescence Assay
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2023
In fireflies, the luciferase enzyme converts a compound called luciferin into oxyluciferin, and produces light or “luminescence” as a result. This reaction requires energy derived from ATP in order to proceed, so researchers have exploited the luciferase-luciferin interaction to gauge ATP levels in cells. Given ATP’s role as the cell’s currency of energy, the ATP bioluminescence assay can provide insight into cellular metabolism and overall cell health.In this video, JoVE discusses cellular...
01:08
Hydrolysis of ATP
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2019
The bonds of adenosine triphosphate (ATP) can be broken through the addition of water, releasing one or two phosphate groups in an exergonic process called hydrolysis. This reaction liberates the energy in the bonds for use in the cell—for instance, to synthesize proteins from amino acids. If one phosphate group is removed, a molecule of ADP—adenosine diphosphate—remains, along with inorganic phosphate. ADP can be further hydrolyzed to AMP—adenosine monophosphate—by the removal of a second...
10:34
Quantification of the Abundance and Charging Levels of Transfer RNAs in Escherichia coli
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Cited by 13 •
2017
Here we present a method for directly measuring transfer RNA charging levels from purified Escherichia coli RNA as well as a way to compare relative levels of transfer RNA, or any other short RNA, across different samples based on the addition of spike-in cells expressing a reference gene.
02:55
Quantification of Immune Mediator Levels in Human Mucosal Lining Fluid
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2025
This video demonstrates the quantification of immune mediator levels in neonatal human nasal mucosal lining fluid extract. An electrochemiluminescence-based multiplex assay system measures these mediators by evaluating the intensity of emitted light when they are excited.
FAQs
The luciferase-luciferin reaction provides the measurement signal: ATP enables light production, and the emitted luminescence is compared with signals from ATP standards. This comparison converts an optical readout into an estimate of ATP in the biological sample. The result therefore depends on both the reaction-generated signal and the reference standards used for interpretation.
Sample collection and extraction are central because ATP must be preserved before the reaction is measured. Poor handling can alter the amount available for detection, whereas careful preparation improves accuracy. The preparation stage is therefore directly connected to quantification quality because it influences whether the measured ATP level represents the original biological sample.
ATP measurements connect a molecular quantity with broader cellular behavior. Changes in the measured level can be used to assess cellular energy status and metabolic activity, making the assay a sensitive indicator of physiological state. This is especially useful when researchers compare how cells, tissues, or microbes respond under different biological or environmental conditions.
A typical workflow begins with collecting the biological sample and extracting its ATP carefully. The prepared sample is then assessed through the luciferase-luciferin reaction, and its emitted luminescence is compared with ATP standards. This sequence links sample preparation, light generation, and reference-based interpretation, producing an estimated ATP amount rather than an unreferenced light signal.
It can support studies of cell viability, proliferation, metabolism, microbial growth, and tissue function. These applications use ATP measurements as an indicator of the biological state of the sample, allowing investigators to examine whether cellular activity differs among samples. The same approach also supports evaluation of responses to environmental or pharmacological stress.
In biology, the measurement provides a way to connect environmental or pharmacological conditions with cellular energy status and metabolic activity. Comparing ATP levels across such conditions can indicate changes in physiological state, while measurements in tissues or microbial systems extend the approach across different biological sample types. Interpretation remains tied to the sampled material and its preparation.