Introduction To Protein

 Protein

Proteins are made from amino acids and therefore always contain the elements carbon, hydrogen, oxygen, and nitrogen and in some cases, sulfur is there. Some proteins form complexes with other molecules contain other elements. Amino acids are monomers.  

There are 20 different types of amino acids that are commonly found in naturally occurring proteins.  The sequence of amino acids in each protein is specific for that protein and typically controlled by the DNA of the cell in which it is made. Proteins are the most abundant molecules found in the cell and makeover 50% of the cell dry mass.

They are essential components of the diet of animals and maybe converted to both fat and carbohydrate by the cells. Their diversity enables them to display a great range of structural and metabolic activities within the organism.

Size Of Protein Molecule

Simple peptide containing two, three, or four amino acid residues are called di-, tri- and tetrapeptides.

The largest protein complexes are found in viruses where Molecular mass of over 400 000 000 are commonly found.

Structure Of Protein