The following points highlight the twenty-one important functions of protein. Some of the functions are: 1. Protective Structures 2. Defence Proteins 3. Toxins 4. Structural Proteins 5. Compatibility Proteins 6. Contractile Proteins 7. Microtubules 8. P-Protein 9. Enzymes 10. Transport Proteins 11. Storage Proteins 12. Receptor Proteins 13. Protein Buffers 14. Hormones 15. Repressors 16. […]