Proteins
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This document summarizes different types of proteins and their functions in the body. It discusses structural proteins that provide support, like silk fibers and keratin; storage proteins that store amino acids, such as ovalbumin and seed proteins; transport proteins that move substances around, including hemoglobin; and hormonal, receptor, contractile, and defensive proteins that coordinate activities, detect stimuli, enable movement, and provide protection, respectively.
Proteins
- 2. Structural Proteins • Support • Insects and spiders use silk fibers. • Keratin is the protein of hair, horns, feathers.
- 3. Storage Proteins • Storage of amino acids • Ovalbumin: protein of egg white – amino acid for developing embryo • Plants have storage proteins in seeds
- 4. Transport Proteins • Transport of other substances • Haemoglobin, iron containing protein, transports oxygen
- 5. Hormonal proteins • Coordination of an organisms activities • Insulin – hormone secreted in pancreas – controls blood glucose levels
- 6. Receptor proteins • Response of cell to chemical stimuli • Receptors in nerve cell membrane detect chemical signals released by other nerve cells
- 7. Contractile proteins • Movement • Actin and myosin: movement of muscles • Other proteins used for movement of flagella
- 8. Defensive proteins • Protection against disease • Antibodies combat bacteria and viruses
- 9. Structural Proteins • Support • Insects and spiders use silk fibers. • Keratin is the protein of hair, horns, feathers.