What are "six" significant uses for protein?

Question

What are "six" significant uses for protein?

Answer 1

1.Enzymes - catalytic activity and function  



2.Transport Proteins - bind & carry ligands - haemoglobin



3.Storage Proteins - ovalbumin, gluten, casein, ferretin  

4.Contractile  (Motor):  can contract, change shape, elements of  cytoskeleton  (actin, myosin, tubulin)  

5.Structural  (Support):  collagen of  tendons & cartilage, elastin of ligaments (tropoelastin),keratin of hair, feathers, & nails, fibroin of silk & webs  

6.Defensive  (Protect):  antibodies (IgG),  fibrinogen & thrombin, snake venoms,  bacterial toxins  

7.Regulatory  (Signal):  regulate metabolic processes, hormones, transcription factors & enhancers,growth factor proteins



8.Receptors (detect stimuli):  light & rhodopsin, membrane receptor proteins and acetylcholine or insulin.  

Answer 2

1- as enzymes

2- as hormones

3- as receptors

4- as catalysts

5- as stimulants

6- as muscle bulders

and many more...