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Charged Amino Acids definitions

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  • Physiological pH
    Approximate pH of 7 where amino acid charge states are determined, crucial for protein function and biochemical reactions.
  • R Group
    Side chain of an amino acid responsible for its unique chemical properties and charge behavior at different pH levels.
  • Acidic Amino Acid
    Type of amino acid with a carboxylate-containing side chain that donates hydrogen ions, resulting in a negative charge at pH 7.
  • Basic Amino Acid
    Type of amino acid with an ionizable nitrogen-containing side chain that accepts hydrogen ions, resulting in a positive charge at pH 7.
  • Aspartic Acid
    Amino acid with a carboxyl group in its side chain, represented by D, forms aspartate when it loses a hydrogen ion.
  • Glutamic Acid
    Amino acid with a longer carboxylate side chain than aspartic acid, represented by E, forms glutamate upon hydrogen ion loss.
  • Lysine
    Amino acid with a four-carbon chain ending in an amino group, represented by K, gains a positive charge by accepting a hydrogen ion.
  • Arginine
    Amino acid with a three-carbon chain and a triangular nitrogen structure, represented by R, carries a positive charge at pH 7.
  • Histidine
    Amino acid with a five-membered ring containing two nitrogens, represented by H, can accept a hydrogen ion and become positively charged.
  • Carboxyl Group
    Functional group in acidic amino acids' side chains responsible for hydrogen ion donation and negative charge formation.
  • Amino Group
    Functional group in basic amino acids' side chains responsible for hydrogen ion acceptance and positive charge formation.
  • Aspartate
    Negatively charged form of aspartic acid after hydrogen ion donation, prevalent at physiological pH.
  • Glutamate
    Negatively charged form of glutamic acid after hydrogen ion donation, prevalent at physiological pH.
  • Charge–Charge Interaction
    Electrostatic attraction or repulsion between charged amino acid side chains, influencing protein structure and function.
  • One Letter Code
    Single-character abbreviation for amino acids, used for quick identification in sequences and mnemonics.