Amino acids are organic molecules that are the fundamental building blocks of proteins. They contain an amino group (-NH2), a carboxyl group (-COOH), and a unique side chain (R-group). This R-group is what distinguishes each amino acid and determines its chemical properties.
Key Characteristics:
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Structure:Each amino acid has a central carbon atom (alpha-carbon) bonded to an amino group, a carboxyl group, a hydrogen atom, and a unique R-group.
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Proteins:Amino acids link together through peptide bonds to form polypeptide chains, which fold into complex three-dimensional structures to create proteins.
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Types:There are 20 common amino acids, some of which are considered essential because the body cannot produce them and they must be obtained from food.
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Functions:Amino acids are crucial for various biological processes, including:
- Protein synthesis: Building and repairing body tissues.
- Enzyme production: Catalyzing chemical reactions.
- Hormone and neurotransmitter synthesis: Regulating bodily functions and nerve transmission.
- Energy source: Providing fuel for the body.
- Other functions: Supporting healthy skin, hair, nails, digestion, and the immune system.
- Protein synthesis: Building and repairing body tissues.
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