Functions

• Enzymes specific proteins to speed up reactions
• keraton the protein that forms hair and nails
• antibodies - proteins that are made by red blood cells to destroy antigens
• Haemoglobin - found in red blood cells to transport oxygen
• Hormones - proteins that circulate in the blood to control changes in the body (not all hormones are proteins)
• Collagen - a protein that is found in connective tissue, which is very strong
• Actin and myosin - two proteins that form muscle tissue which are vital for movement