Fibrous proteins
Globular proteins
1.
They are long, elongated, thread-like and asymmetric in shape
They are spherical, oval or elliptical in shape
2.
The peptide chains are held together by strong intermolecular hydrogen bonds
The peptide chains are held together by relatively weak intramolecular hydrogen bonds
3.
They are insoluble in water but soluble in concentrated acids and alkalis
They are soluble in water
4.
Examples: Keratin, Fibroin, Collagen
Examples: Insulin, Casein, Egg albumin, myoglobin, antibodies
