Question

write the Types of proteins ​

Answer 1

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Depending upon the molecular shape proteins are classified into two types.

a. Globular proteins :

Molecules of globular proteins have spherical shape. This shape results from coiling around of the polypeptide chain of protein. Globular proteins are usually soluble in water. For example : insulin, egg albumin, serum albumin, legumelin (protein in pulses)

b. Fibrous proteins :

Molecules of fibrous proteins have elongated, rod like shape. This shape is the result of holding the polypeptide chains of protein parallel to each other. Hydrogen bonds and disulfide bonds are responsible for this shape. Fibrous proteins are insoluble in water. For example : keratin (present in hair, nail, wool), myosin (protein of muscles).

The shapes of protein molecules are the result of four level structure of proteins