During the breakdown of fatty acids, not all acetyl CoA enters the citric acid cycle, and your body converts some acetyl CoA to ketone bodies.
Acids are molecules or ions that can donate protons, known as Bronsted-Lowry acids, or form covalent bonds with electron pairs, known as Lewis acids. The first category of acids is proton donors or Brønsted-Lowry acids.
Acids are used as catalysts in technical and organic chemistry. For example, sulfuric acid is used in very large amounts in the alkylation process for producing gasoline. Some acids, such as sulfuric acid, phosphoric acid, and hydrochloric acid, also cause dehydration and condensation reactions. Although about 500 amino acids have been identified in nature, only 20 amino acids make up the proteins found in the human body.
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