Globular proteins have a spherical shape formed as polypeptide chains coil around. They are generally soluble in water. Examples of globular proteins include insulin and albumins.

Fibrous proteins have a fiber-like structure with parallel polypeptide chains held together by hydrogen and disulphide bonds. Examples include keratin (in hair, wool, silk) and myosin (in muscles).

A protein is a polypeptide with more than a hundred amino acid residues, having a molecular mass higher than 10,000u. However, the distinction is not sharp, and polypeptides with fewer amino acids might be called proteins if they exhibit a ...

Dipeptide is a product of the combination of two amino acids through a peptide bond. Similarly, tripeptide, tetrapeptide, and polypeptide are formed by the linkage of three, four, and more than ten amino acids, respectively, through peptide linkages.

A peptide bond, also known as a peptide linkage, is an amide formed between the -COOH group and -NH₂ group of amino acids. It is created through a reaction between the amino group of one amino acid and the carboxyl ...