Globular proteins have compact rounded molecules and are usually water-soluble. Of prime importance are the enzymes , proteins that catalyse biochemical reactions. Fibrous proteins are generally insoluble in water and consist of long coiled strands or flat sheets, which confer strength and elasticity. In this category are keratin and collagen . Actin and myosin are the principal fibrous proteins of muscle, the interaction of which brings about muscle contraction.
Blood clotting involves the fibrous protein called fibrin.
This usually inactivates their biological properties. All rights reserved.