structure of protein

structure of protein

1. primary structure

   • linear chain of amino acid
     • peptide bond
       • forms bet carboxyl &amino group

2. secondary

   • sequence of amino acids
   • linear struct, folds bcoz of hydrogen bonds
     • when hydrogen bonds are strong they form helical shape. when hydrogen bonds are weak they form longer straight form 

3. tertiary

   • compact struct. of protein
     • 3 dimensional
     • intense coiling
     • held by various
       • eg: hydrogen bond       disulfide bond       ionic bond       weak hydrophobic rxn

4. quaternary

   • 3 dimensional stuct
   • contains non protein structure like haem grop
     • haem = iron