Cytochrome oxidase
Cytochrome Oxidase
Cytochrome oxidase (pronunciation: /ˈsaɪtoʊkroʊm ɒkˈsɪdeɪz/), also known as cytochrome c oxidase or Complex IV, is an enzyme that is part of the electron transport chain in mitochondria. It is the last enzyme in the respiratory electron transport chain of mitochondria located in the mitochondrial membrane.
Etymology
The term "cytochrome" comes from the Greek words "kytos" meaning "cell" and "chroma" meaning "color". This is due to the pigmented nature of the cytochromes. "Oxidase" refers to the enzyme's ability to oxidize substrates.
Function
Cytochrome oxidase is responsible for the reduction of oxygen to water, a process which involves the transfer of four electrons. This process is crucial for the production of adenosine triphosphate (ATP), the main energy source for many cellular processes.
Structure
Cytochrome oxidase is a large transmembrane protein complex found in the mitochondrial membrane. It consists of several subunits, including cytochrome a, cytochrome a3, and two copper centers, known as CuA and CuB.
Related Terms
- Electron transport chain
- Mitochondria
- Mitochondrial membrane
- Adenosine triphosphate
- Transmembrane protein
External links
- Medical encyclopedia article on Cytochrome oxidase
- Wikipedia's article - Cytochrome oxidase
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