In this article we will discuss about the structure of IgG, explained with the help of suitable diagrams. Electron microscopic studies have revealed that IgG is a Y-shaped tetrapeptide protein (Fig. 8.20) formed of two identical light chains and two identical heavy chains. So an antibody is represented as H2L2. Light Chains: Each light chain is formed of about 214 [...]
In this article we will discuss about the Lowry’s method for estimation of protein in plants. Principle: The blue colour developed by the reduction of the phosphomolybdic-phosphotungstic components in the Folin-Ciocalteau reagent by the amino acids tyrosine and tryptophan present in the protein plus the colour developed by the biuret reaction of the protein with the alkaline cupric tartrate are [...]
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. Sweet Proteins and Others. Function [...]