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An amino acid is a molecule containing an amine group, a carboxylic acid and a side chain, R, that varies depending on the amino acid.

General structureEdit

A-amino acid general skeletal

The general chemical structure of an alpha amino acid.


Proteinogenic amino acidsEdit

These amino acids are used in proteins and divided up into essential and non-essential amino acids.

Essential Non-essential
Isoleucine
L-Isoleucine-2D-skeletal
Alanine
Alanine-2D-skeletal
Leucine
L-Leucine-2D-skeletal
Arginine
Arginine-2D-skeletal
Lysine
L-Lysine-2D-skeletal
Asparagine
Asparagine-2D-skeletal
Methionine*
Methionine-2D-skeletal
Aspartic acid
Aspartic acid-2D-skeletal
Phenylalanine
Phenylalanine-2D-skeletal
Cysteine*
Cysteine-2D-skeletal
Threonine
L-Threonine-2D-skeletal
Glutamic acid
Glutamic acid-2D-skeletal
Tryptophan
L-Tryptophan-2D-skeletal
Glutamine
Glutamine-2D-skeletal
Valine
L-Valine-2D-skeletal
Glycine
Glycine-2D-skeletal
- - Histidine
Histidine-2D-skeletal
- - Proline
Proline-2D-skeletal
- - Selenocysteine
L-Selenocysteine-2D-skeletal
- - Serine
Serine-2D-skeletal
- - Tyrosine
L-Tyrosine-2D-skeletal
  • - These amino acids contain sulphur atoms.