ESSENTIAL AND NON-ESSENTIAL AMINO ACIDS

Amino acids are classified into two groups .They are essential (indispensable) and non-essential (dispensable). An essential amino acid is one which cannot be synthesized by the body to meet the physiological needs and hence should be supplied by the diet. The major essential amino acids are histidine,
isoleucine, leucine, lysine, methionine, phenylalanine threonine,tryptophan and valine. Non-essential amino acids are those that the body can be synthesized. They are alanine, arginine, aspargine, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine and tyrosine.

The Twenty Amino Acids Found in Proteins:They are represented in the following table.