*1.2.3 Sources of pectinase*

Pectinase plays a very significant role in various biological processes across the entire field of living organism. The pectinase is widely distributed in nature and produced by different living organisms such as plants, microorganisms, insects, nematodes and protozoa. Microorganisms are considered as primary source for the production of industrial important enzymes.

**Figure 4.** *Three-dimensional structure of pectinase [25].*
