Classification of proteins based on chemical properties?

Depending on their chemical properties and optical activity, the amino acids in proteins are classified under the following heads:

1) Morzo anzino mono carboxylic acids: Examples include glycine, alanine, valine, leucine, isoleucine, serine and threonine.

2) Mono amino dicarboxylic acids: Examples include aspartic acid and glutamic acid.

3) Diamino mono carboxylic acids: Arginine 'and lysine.

4) Sulpfitlr containing amino acids: Cysteine, cystine and methionine

5) Aromatic and heterocyclic amino acids: Phenylalanine, tyrosine, histidine, tryptophan , proline and hydroxyproline.