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  2. Essential amino acid - Wikipedia

    en.wikipedia.org/wiki/Essential_amino_acid

    The limiting amino acid is the essential amino acid which is furthest from meeting nutritional requirements. [4] This concept is important when determining the selection, number, and amount of foods to consume because even when total protein and all other essential amino acids are satisfied if the limiting amino acid is not satisfied then the ...

  3. Lysine - Wikipedia

    en.wikipedia.org/wiki/Lysine

    Lysine (symbol Lys or K) [2] is an α-amino acid that is a precursor to many proteins.Lysine contains an α-amino group (which is in the protonated −NH + 3 form when the lysine is dissolved in water at physiological pH), an α-carboxylic acid group (which is in the deprotonated −COO − form when the lysine is dissolved in water at physiological pH), and a side chain (CH 2) 4 NH 2 (which ...

  4. Protein quality - Wikipedia

    en.wikipedia.org/wiki/Protein_quality

    Protein quality is the digestibility and quantity of essential amino acids for providing the proteins in correct ratios for human consumption. There are various methods that rank the quality of different types of protein, some of which are outdated and no longer in use, or not considered as useful as they once were thought to be.

  5. Biological value - Wikipedia

    en.wikipedia.org/wiki/Biological_value

    Amino acid composition, and the limiting amino acid, which is usually lysine; Preparation (cooking) Vitamin and mineral content; Amino acid composition is the principal effect. All proteins are made up of combinations of the 21 biological amino acids.

  6. Amino acid - Wikipedia

    en.wikipedia.org/wiki/Amino_acid

    The first few amino acids were discovered in the early 1800s. [8] [9] In 1806, French chemists Louis-Nicolas Vauquelin and Pierre Jean Robiquet isolated a compound from asparagus that was subsequently named asparagine, the first amino acid to be discovered.

  7. Leucine - Wikipedia

    en.wikipedia.org/wiki/Leucine

    Leucine (symbol Leu or L) [3] is an essential amino acid that is used in the biosynthesis of proteins.Leucine is an α-amino acid, meaning it contains an α-amino group (which is in the protonated −NH 3 + form under biological conditions), an α-carboxylic acid group (which is in the deprotonated −COO − form under biological conditions), and a side chain isobutyl group, making it a non ...

  8. Quality Protein Maize - Wikipedia

    en.wikipedia.org/wiki/Quality_Protein_Maize

    In Central and South America, Africa, and Asia, several hundred million people rely on maize as their principal daily food, for weaning babies, and for feeding livestock.. Unfortunately maize (corn) has two significant flaws; it lacks the full range of amino acids, namely lysine and tryptophan, needed to produce proteins, and has its niacin (vitamin B 3) bound in an indigestible compl

  9. 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.