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2. 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.It contains an α-amino group (which is in the protonated −NH + 3 form when dissolved in water), an α-carboxylic acid group (which is in the deprotonated −COO − form when dissolved in water), and a side chain lysyl ((CH 2) 4 NH 2), classifying it as a basic, charged (at physiological pH), aliphatic ...

3. 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 ...

4. Essential amino acid - Wikipedia

   en.wikipedia.org/wiki/Essential_amino_acid

   An essential amino acid, or indispensable amino acid, is an amino acid that cannot be synthesized from scratch by the organism fast enough to supply its demand, and must therefore come from the diet. Of the 21 amino acids common to all life forms, the nine amino acids humans cannot synthesize are valine, isoleucine, leucine, methionine ...

5. Copper peptide GHK-Cu - Wikipedia

   en.wikipedia.org/wiki/Copper_peptide_GHK-Cu

   Pickart proposed that this activity in human plasma albumin was a tripeptide glycyl-L-histidyl-L-lysine and that it might function by chelating metal ions. [7] In 1977, the growth modulating peptide was shown to be a glycyl-L-histidyl-L-lysine. [8] It is proposed that GHK-Cu modulates copper intake into cells. [9]

6. Branched-chain amino acid - Wikipedia

   en.wikipedia.org/wiki/Branched-chain_amino_acid

   A branched-chain amino acid (BCAA) is an amino acid having an aliphatic side-chain with a branch (a central carbon atom bound to three or more carbon atoms). Among the proteinogenic amino acids, there are three BCAAs: leucine, isoleucine, and valine. [ 1 ] Non-proteinogenic BCAAs include 2-aminoisobutyric acid and alloisoleucine.

7. Arginine - Wikipedia

   en.wikipedia.org/wiki/Arginine

   Arginine is the amino acid with the formula (H 2 N)(HN)CN(H)(CH 2) 3 CH(NH 2)CO 2 H. The molecule features a guanidino group appended to a standard amino acid framework. At physiological pH, the carboxylic acid is deprotonated (−CO 2 −) and both the amino and guanidino groups are protonated, resulting in a cation.