6. Find out and make a list of proteins used as therapeutic agents. Find other applications of proteins (e.g., Cosmetics etc.)

 Proteins used as therapeutic agents are as follows:

1) Thrombin and fibrinogen – They help in blood clotting.

2) Antigen (antibody) – It helps in blood transfusion.

3) Insulin – It helps in maintaining blood glucose level in the body.

4) Renin – It helps in osmoregulation.

Proteins are also commonly used in the manufacture of cosmetics, toxins, and as biological buffers.