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Cellular Oxygen
- Molecular classification
- Gas, Inorganic Molecule
01
Overview
Cellular oxygen refers to molecular oxygen (O2) present within cells, where it plays a critical role as the terminal electron acceptor in aerobic respiration. This process is essential for the efficient production of adenosine triphosphate (ATP), which powers most cellular activities. While not a classical drug target, its availability impacts energy homeostasis, redox balance, and cell viability. Its presence determines whether cells use highly efficient aerobic metabolism versus less efficient anaerobic alternatives.
- Other names
- Molecular OxygenO2
02
Biological functions
Electron acceptorAerobic respirationATP productionOxidative phosphorylation
03
Disease associations
HypoxiaIschemiaCancer (metabolic adaptation)Other (Cell viability)
04
Safety considerations
Hyperoxia (oxygen toxicity)Reactive oxygen species (ROS) formationOxidative stress
05
Biomarkers
Oxygen consumption rate (OCR)Hypoxia-inducible factors (HIFs)
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