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Acetyl coenzyme A

Noun 1. A compound, C25H38N7O17P3S, that functions as a coenzyme in many biological acetylation reactions and is formed as an intermediate in the oxidation of carbohydrates, fats, and proteins. Also called acetyl-coA. ( 2. An important molecule in metabolism, used in many biochemical reactions. Its main function is to convey the carbon atoms within the acetyl group to the citric acid cycle (Krebs cycle) to be oxidized for energy production. ( 3. Acetyl CoA participates in the biosynthesis of fatty Acids and sterols, in the oxidation of fatty acids and in the metabolism of many amino acids. It also acts as a biological acetylating agent....

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Acetylcholine (Ach)

/əˌsētlˈkōˌlēn/  /ˌasitl-/ 1. An organic, polyatomic cation that acts as a neurotransmitter in both the peripheral nervous system (PNS) and central nervous system (CNS) in many organisms including humans. ( 2. Acetylcholine is one of many neurotransmitters in the autonomic nervous system (ANS) and is the only neurotransmitter used in the motor division of the somatic nervous system (sensory neurons use glutamate and various peptides at their synapses). Acetylcholine is also the principal neurotransmitter in all autonomic ganglia. ( 3. (Biochemistry) A neurotransmitter in humans and other animals. It is an ester of acetic acid and choline with chemical formula CH3COOCH2CH2N+(CH3)3. ( 4. (Chemical, Neurology, physiology) A chemical found in vertebrate neurons that carries information across the synaptic cleft, the space between two nerve cells. ( 5. A compound that occurs throughout the nervous system, in which it functions as a neurotransmitter. (Google...

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