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

Proteins do a great variety of jobs, and several are used directly as therapeutic agents or in other applications.

Proteins used as therapeutic agents:

• Insulin — a protein hormone, given to treat diabetes.
• Antibodies — proteins that fight infectious agents, used in immune therapy and diagnosis.
• Enzymes such as trypsin — proteins used to help break down or process substances medically.

Other applications of proteins:

• Collagen — the protein that forms the intercellular ground substance; widely used in cosmetics and skin and beauty products. …

Proteins carry out an enormous range of jobs in living organisms. Some transport nutrients across the cell membrane, some fight infectious organisms, some act as hormones, and some act as enzymes. This very versatility is why proteins are so useful both in medicine and in other industries.

Proteins used as therapeutic agents:

• Insulin — a protein that acts as a hormone. It is one of the best-known protein medicines, used to manage diabetes.
• Antibodies — proteins whose natural role is to fight infectious agents. This same property makes them valuable in treatment and in diagnosis.
• Enzymes such as trypsin — proteins that act as biological catalysts and can be put to medical use in breaking down or processing substances.

Other applications of proteins:

• Collagen — the most abundant protein in the animal world and the material that forms the intercellular ground substance. Because of its structural and skin-related properties, it is a familiar ingredient in cosmetics and beauty products. …

Method: Linking a Protein's Natural Role to Its Practical Application

The efficient way to answer a "find applications of X" question is to work outward from the different NATURAL jobs a protein already does in the body, since almost every practical/industrial use of a protein is a direct extension of one of its biological roles rather than something unrelated invented from scratch.

Start by recalling the range of things proteins naturally do: some act as hormones (insulin), some defend the body against infection (antibodies), some catalyse reactions (enzymes like trypsin), and some provide structural support (collagen). Then, for each natural role, ask "how would this same property be useful outside the body?" A hormone that regulates blood sugar becomes a hormone replacement therapy; a molecule built to recognise and neutralise a specific foreign target becomes a diagnostic or immune-therapy tool; a structural protein that gi …