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  2. Amino acid | Definition, Structure, & Facts | Britannica

    www.britannica.com/science/amino-acid

    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 for α-amino [alpha-amino] carboxylic acid. Examples of amino acids include glycine and threonine.

  3. Amino acid - Wikipedia

    en.wikipedia.org/wiki/Amino_acid

    Amino acids are organic compounds that contain both amino and carboxylic acid functional groups. [1] Although over 500 amino acids exist in nature, by far the most important are the 22 α-amino acids incorporated into proteins. [2] Only these 22 appear in the genetic code of life. [3] [4]

  4. Definition. Amino acids are the building blocks of polypeptides and proteins and play important roles in metabolic pathway, gene expression, and cell signal transduction regulation. A single organic amino acid molecule contains two functional groups – amine and carboxyl – and a unique side chain.

  5. Amino acids are a crucial, yet basic unit of protein, and they contain an amino group and a carboxylic group. They play an extensive role in gene expression process, which includes an adjustment of protein functions that facilitate messenger RNA (mRNA) translation. There are over 700 types of amino acids that have been discovered in nature.

  6. Amino Acid Definition and Examples - ThoughtCo

    www.thoughtco.com/definition-of-amino-acid-605822

    An amino acid is an organic compound characterized by having a carboxyl group, amino group, and side-chain attached to a central carbon atom. Amino acids are used as precursors for other molecules in the body. Linking amino acids together forms polypeptides, which may become proteins.

  7. 2.2: Structure & Function - Amino Acids - Biology LibreTexts

    bio.libretexts.org/Bookshelves/Biochemistry/Book:_Biochemistry_Free_For_All...

    All amino acids have the same basic structure, which is shown in Figure 2.1. At the “center” of each amino acid is a carbon called the α carbon and attached to it are four groups - a hydrogen, an α- carboxyl group, an α-amine group, and an R-group, sometimes referred to as a side chain.

  8. Amino Acid: Benefits & Food Sources - Cleveland Clinic

    my.clevelandclinic.org/health/articles/22243-

    Amino acids are molecules used by all living things to make proteins. Your body needs 20 different amino acids to function correctly. Nine of these amino acids are called essential amino acids.

  9. amino acid | Learn Science at Scitable - Nature

    www.nature.com/scitable/definition/amino-acid-115

    Amino acids are small molecules that are the building blocks of proteins. Proteins serve as structural support inside the cell and they perform many vital chemical reactions....

  10. Amino acid Definition & Meaning - Merriam-Webster

    www.merriam-webster.com/dictionary/amino acid

    noun. : an amphoteric organic acid containing the amino group NH2. especially : any of the various amino acids having the amino group in the alpha position that are the chief components of proteins and are synthesized by living cells or are obtained as essential components of the diet.

  11. Essential Amino Acids: Definition, Benefits, and Food Sources - ...

    www.healthline.com/nutrition/essential-amino-acids

    Amino acids, often referred to as the building blocks of proteins, are compounds that play many critical roles in your body. You need them for vital processes such as building proteins,...