Amino Acids In Zwitterionic Form
Amino acids are organic compounds that contain an amine group, a carboxylic acid group, and a side chain (-R group). Depending on the pH of the solution, these different ends and -R groups may be protonated or deprotonated. A neutral amino acid that contains both a positive and a negative charge is called a zwitterion (i.e. when the amino end is protonated to form -NH3+ and the carboxyl group is deprotonated to form −CO2−).
Amino acids are classified by the chemical properties given them by their side chains: non-polar (hydrophobic), polar, acidic, and basic. The primary structure of a protein is the linear sequence of amino acids, and the protein’s secondary structure is determined by interactions between side chains on nearby amino acids.

Amino Acids In Zwitterionic Form

Amino acids are organic compounds that contain an amine group, a carboxylic acid group, and a side chain (-R group). Depending on the pH of the solution, these different ends and -R groups may be protonated or deprotonated. A neutral amino acid that contains both a positive and a negative charge is called a zwitterion (i.e. when the amino end is protonated to form -NH3+ and the carboxyl group is deprotonated to form −CO2−).

Amino acids are classified by the chemical properties given them by their side chains: non-polar (hydrophobic), polar, acidic, and basic. The primary structure of a protein is the linear sequence of amino acids, and the protein’s secondary structure is determined by interactions between side chains on nearby amino acids.