here i write about Protein and its classification on the basis of shape and size, solubility and physical properties and also about functional properties in an easy way, and i make chart of proteins classification i think this is an easy way to remember and learn. okay thank you.

3. Class of protein Functions Example
1. Enzymatic protein Biological catalyst Urease, Amylase, Catalase, Cytochrome
C, Alcohol hydrogenase
2. Structural protein Strengthening and protecting biological
structure
Collagen, Elastin, Keratin, Fibroin
3.Transport and carrier protein Transport of ion and molecules in a body Myoglobin, hemoglobin, Ceruloplasmin,
Lipoproteins
4. Nutrient and storage protein Provide nutrition to growing embryo and
store ions
Ferritin, Casein, ovalbumin
5. Contractile or motile protein Function in contractile system Actin, Myosin,Tubulin
6. Defence protein Defend against other organisms Antibodies, Fibrinogen,Thrombin
7.Toxin protein Hydrolyse or degrade enzymes Snake venom, Ricin
8. Regulatory protein Regulate cellular or metabolic activities Insulin, G protein, Growth hormone