Protein denaturation and coagulation

What is denaturation

The change in structure of protien molecules (unfolding)

Why does denaturation occur?

Heat, PH, mechanical action and salts can all contribute to denaturation

What is partially reversible?

It can partially go back to its previous state, such as when an egg white is whiisked

What is coagulation?

Coagulation follows denaturation. the heat causes the proteins to unfold from their coiled state and form a solid stable network

Example of denaturation

skin formed on top of heated milk

Examples of coagulation

meat fibres become firm

egg whites changing from a clear liquid to a white solid

How does denaturation effect the nutritional value of foods

It is generally unchanged, and denatured proteins are more easily digested

describe the picture 2

Picture two: Denaturation is when molecules in the protein are being broken down. This happens when the proteins are physically agitated, heated or marinated in acid

Describe picture 3

Picture three: Coagulation is when the denatured proteins join back to together. This occurs when heat is applied to the protein.

What are the four elements contained in all amino acids are

Carbon, Hydrogen, Nitrogen and oxygen

What is a dipeptide?

When two amino acids form a bond

What is a polypeptide?

A structure created when three or more amino acids form bonds between each other