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  2. Essential amino acid - Wikipedia

    en.wikipedia.org/wiki/Essential_amino_acid

    The distinction between essential and non-essential amino acids is somewhat unclear, as some amino acids can be produced from others. The sulfur-containing amino acids, methionine and homocysteine, can be converted into each other but neither can be synthesized de novo in humans. Likewise, cysteine can be made from homocysteine but cannot be ...

  3. Amino acid synthesis - Wikipedia

    en.wikipedia.org/wiki/Amino_acid_synthesis

    The commercial production of amino acids usually relies on mutant bacteria that overproduce individual amino acids using glucose as a carbon source. Some amino acids are produced by enzymatic conversions of synthetic intermediates. 2-Aminothiazoline-4-carboxylic acid is an intermediate in the industrial synthesis of L-cysteine for example.

  4. Amino acid - Wikipedia

    en.wikipedia.org/wiki/Amino_acid

    In addition, cysteine, tyrosine, and arginine are considered semiessential amino acids, and taurine a semi-essential aminosulfonic acid in children. Some amino acids are conditionally essential for certain ages or medical conditions. Essential amino acids may also vary from species to species.

  5. Protein metabolism - Wikipedia

    en.wikipedia.org/wiki/Protein_metabolism

    Ribosomes translate the codons to their respective amino acids. [1] In humans, non-essential amino acids are synthesized from intermediates in major metabolic pathways such as the Citric Acid Cycle. [2] Essential amino acids must be consumed and are made in other organisms. The amino acids are joined by peptide bonds making a polypeptide chain.

  6. Complete protein - Wikipedia

    en.wikipedia.org/wiki/Complete_protein

    In a plant-based diet there is the perceived issue of amino acid content of various individual foods. A satisfying diet however, will include minimum requirements of all essential amino acids. In addition to grains, such as corn, rice, or wheat, vegetable protein also occurs in legumes, which include beans and peanuts.

  7. Histidine - Wikipedia

    en.wikipedia.org/wiki/Histidine

    Histidine (symbol His or H) [2] is an essential amino acid that is used in the biosynthesis of proteins.It contains an α-amino group (which is in the protonated –NH 3 + form under biological conditions), a carboxylic acid group (which is in the deprotonated –COO − form under biological conditions), and an imidazole side chain (which is partially protonated), classifying it as a ...

  8. Transamination - Wikipedia

    en.wikipedia.org/wiki/Transamination

    Transamination is a chemical reaction that transfers an amino group to a ketoacid to form new amino acids.This pathway is responsible for the deamination of most amino acids. This is one of the major degradation pathways which convert essential amino acids to non-essential amino acids (amino acids that can be synthesized de novo by the organism).

  9. Tyrosine - Wikipedia

    en.wikipedia.org/wiki/Tyrosine

    L-Tyrosine or tyrosine (symbol Tyr or Y) [2] or 4-hydroxyphenylalanine is one of the 20 standard amino acids that are used by cells to synthesize proteins.It is a conditionally essential amino acid with a polar side group.

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