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  2. Protein as nutrient - Wikipedia

    en.wikipedia.org/wiki/Protein_as_nutrient

    There, most of the peptides are broken into single amino acids. Absorption of the amino acids and their derivatives into which dietary protein is degraded is done by the gastrointestinal tract. The absorption rates of individual amino acids are highly dependent on the protein source; for example, the digestibilities of many amino acids in ...

  3. 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 ...

  4. Amino acid - Wikipedia

    en.wikipedia.org/wiki/Amino_acid

    Of the 20 standard amino acids, nine (His, Ile, Leu, Lys, Met, Phe, Thr, Trp and Val) are called essential amino acids because the human body cannot synthesize them from other compounds at the level needed for normal growth, so they must be obtained from food. [81] [82] [83]

  5. Tyrosinase - Wikipedia

    en.wikipedia.org/wiki/Tyrosinase

    In all models, only the tyrosinase molecule is shown, copper atoms are shown in green and the molecular surface is shown in red. In models D and E, histidine amino acids are shown as a blue line representation. From model E, each copper atom within the active site is indeed complexed with three histidine residues, forming a type 3 copper center ...

  6. Leucine - Wikipedia

    en.wikipedia.org/wiki/Leucine

    Leucine ball and stick model spinning. 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 ...

  7. Histidine - Wikipedia

    en.wikipedia.org/wiki/Histidine

    Histidine ball and stick model spinning. 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 ...

  8. The best skin care routine for your 50s, according to ... - AOL

    www.aol.com/lifestyle/best-skin-care-routine-for...

    Dr. Chaudhry recommends Perricone MD Smoothing & Brightening Under-Eye Cream for its potent mix of antioxidants, plumping amino acids and fatty acids to support your under-eye skin's barrier and ...

  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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