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4.2. Amino acids

Amino acids

The amino acids are small molecules, monomers of peptides and proteinsThey are crystalline, almost all sweet and present isomerism, since they have an asymmetric carbon linked to four different radicals (except in the case of glycine or glycine). These radicals are:

  • carboxyl group (-COOH), acidic.
  • An amino group (-NH2), basic.
  • A hydrogen.
  • radical, characteristic of each amino acid, and which gives it its own characteristics. They serve as criteria for the classification of amino acids.

Estructura de un aminoácido Por OpenStax College [CC BY 3.0], undefined

The carboxyl group is always at one end, but the amino group can occupy different positions. Thus, α, β, γ,… amino acids are distinguished, depending on the position of the amino group with respect to the carbon of the carboxyl group. In nature, both the amino and the carboxyl groups are attached to the same carbon, so they are amino acids of type α or α-amino acids.

The proteins are polymers of α-amino acids, which can be released by hydrolysis. Although about 200 amino acids are known, only twenty are part of proteins.

Fundamental Ideas About Amino Acids

The amino acids are monomers that are peptides and proteins.

The amino acids are formed by one asymmetric carbon bonded to four different radicals (except the glycine or glycine). These radicals are:

  • carboxyl group (-COOH), acidic.
  • An amino group (-NH2), basic.
  • hydrogen.
  • radical, characteristic of each amino acid, and which gives it its own characteristics.