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If the side chain contains carboxylic acid, the amino acids in the acidic-polar classification are Aspartic Acid and Glutamic Acid. Furthermore, if the side chain consists of a carboxylic acid and basic-polar, these amino acids are Lysine, Arginine, and Histidine.
Learn about what differentiates acidic and basic amino acids, starting with the structure and nature of amino acids, the general difference between acidic vs. basic substances on the pH scale, and why these differences matter.
Nutritionists divide amino acids into two groups - essential amino acids (must be in the diet because cells can’t synthesize them) and non-essential amino acids (can be made by cells). This classification of amino acids has little to do with the structure of amino acids.
Amino acids are the building blocks of polypeptides and proteins and play important roles in metabolic pathway, gene expression, and cell signal transduction regulation. A single organic amino acid molecule contains two functional groups – amine and carboxyl – and a unique side chain.
In chemistry, an amino acid is an organic compound containing an amino functional group (-NH 2) and a carboxylic acid functional group (-COOH). Proteins are long chains or polymers composed of a specific type of amino acid known as an α-amino acid.
There are 22 amino acids that are found in proteins and of these, only 20 are specified by the universal genetic code. The others, selenocysteine and pyrrolysine use tRNAs that are able to base pair with stop codons in the mRNA during translation.
Acidic and Basic Amino Acids. There are three amino acids that have basic side chains at neutral pH. These are arginine (Arg), lysine (Lys), and histidine (His). Their side chains contain nitrogen and resemble ammonia, which is a base.