Pectinase P4300 is a natural pectinase (polygalacturonase) derived from fungus Rhizops sp. that randomly hydrolyzes the (1→4)-α-D-galactosiduronic linkages in pectate and other galacturonans. This enzyme breaks down pectin found in the middle lamella of plant cell walls. Pectinase helps facilitate the maceration of plant materials and extraction processes. Pectinase P4300 is used in plant protoplast preparation to digest cell wall prior to organelle isolation.

用于植物原生质体制备，在细胞器分离前消化细胞壁。

One unit will liberate 1.0 μmole of galacturonic acid from polygalacturonic acid per min at pH 4.0 at 25 °C.