Nadh Atp Balance
Nadh Atp Balance - Related Videos
01:31
ATP Yield
0 Views •
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
0 Views •
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...
12:07
NADH Fluorescence Imaging of Isolated Biventricular Working Rabbit Hearts
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Cited by 24 •
2012
The objective is to monitor the mitochondrial redox state of isolated hearts within the context of physiologic preload and afterload pressures. A biventricular working rabbit heart model is presented. High spatiotemporal resolution fluorescence imaging of NADH is used to monitor the mitochondrial redox state of epicardial tissue.
01:08
Hydrolysis of ATP
0 Views •
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...
12:03
Detection of Microregional Hypoxia in Mouse Cerebral Cortex by Two-photon Imaging of Endogenous NADH Fluorescence
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Cited by 11 •
2012
Here we describe a method to directly visualize microregional tissue hypoxia in the mouse cortex in vivo. It is based on concurrent two-photon imaging of nicotinamide adenine dinucleotide (NADH) and the cortical microcirculation. This method is useful for high resolution analysis of tissue oxygen supply.
FAQs
Oxygen limitation reduces the extent to which NADH can donate electrons to the mitochondrial electron transport chain. Cells instead use fermentation to regenerate NAD+, preserving glycolysis but producing less ATP. Thus, oxygen availability influences both the handling of reducing power and the amount of usable energy generated through cellular metabolism.
Electron transfer from NADH through the mitochondrial electron transport chain pumps protons across the inner membrane. This separation creates an electrochemical gradient, meaning a stored difference in charge and proton concentration. ATP synthase uses that gradient to make ATP, connecting the flow of electrons with the cell’s supply of chemical energy.
The balance shows how cells coordinate the production of reducing power with their ability to convert it into ATP. Glycolysis and the citric acid cycle generate NADH, while the electron transport chain and ATP synthase support ATP formation. Comparing these linked processes helps explain how metabolism responds to changing energy demands or nutrient supply.
With sufficient oxygen, NADH contributes electrons to mitochondrial electron transport, supporting proton-gradient formation and ATP synthesis. When oxygen is limited, fermentation primarily restores NAD+ so glycolysis can continue rather than sustaining the same electron-transfer pathway. This preserves a source of ATP production, but the overall yield is lower.
Hypoxia, or reduced oxygen availability, limits the use of NADH by the mitochondrial electron transport chain. Cells therefore rely more on NAD+ regeneration through fermentation to maintain glycolysis. The resulting shift helps explain why oxygen limitation changes energy production and can leave cells with less ATP available for biological work.
Changes in this balance provide a framework for examining whether mitochondrial electron transfer is effectively connected to ATP synthesis. NADH generated by glycolysis and the citric acid cycle must support proton-gradient formation for ATP synthase to produce ATP. Studying this relationship helps interpret mitochondrial performance under altered nutrient supply or oxygen conditions.