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Amino acid | Definition, Structure, & Facts | Britannica
2025年2月2日 · Amino acid, any of a group of organic molecules that consist of a basic amino group, an acidic carboxyl group, and a unique organic side chain. The term amino acid is short …
What is an amino acid? | Britannica - Encyclopedia Britannica
2025年1月22日 · An amino acid is an organic molecule that is made up of a basic amino group (−NH 2), an acidic carboxyl group (−COOH), and an organic R group (or side chain) that is …
Structure and properties of amino acids | Britannica
amino acid, Any of a class of organic compounds in which a carbon atom has bonds to an amino group (―NH 2), a carboxyl group (―COOH), a hydrogen atom (―H), and an organic side …
Protein - Amino Acids, Structure, Function | Britannica
2025年1月14日 · Protein - Amino Acids, Structure, Function: The common property of all proteins is that they consist of long chains of α-amino (alpha amino) acids. The α-amino acids are so …
Amino acid - Building Blocks, Structure, Functions | Britannica
2025年2月2日 · Amino acid - Building Blocks, Structure, Functions: One of the most useful manners by which to classify the standard (or common) amino acids is based on the polarity …
Amino acid Definition & Meaning | Britannica Dictionary
AMINO ACID meaning: any one of many acids that occur naturally in living things and that include some which form proteins
Protein | Definition, Structure, & Classification | Britannica
2025年1月14日 · There are about 20 different amino acids that occur naturally in proteins. Proteins of similar function have similar amino acid composition and sequence. Although it is …
Isoleucine | Amino Acid, Protein, Metabolism | Britannica
Isoleucine, an amino acid present in most common proteins, sometimes comprising 2 to 10 percent by weight. First isolated in 1904 from fibrin, a protein involved in blood-clot formation, …
amino acid - Students | Britannica Kids | Homework Help
Chemists define an amino acid as any group of organic molecules that consist of a basic amino group (–NH 2), an acidic carboxyl group (–COOH), and a specific organic side chain that is …
Amino acid - Reactions, Structure, Synthesis | Britannica
2025年2月2日 · Amino acid - Reactions, Structure, Synthesis: Amino acids via their various chemical functionalities (carboxyls, amino, and R groups) can undergo numerous chemical …