Pectinase pectin a multi-enzyme complex, usually including the original pectinase, pectin methyl ester hydrolases, pectin, acid enzymes. Through their joint role of pectin can be completely decomposed. Natural pectin under Protopectinase role, into the water-soluble pectin; pectin was pectin methyl ester hydrolase catalytic remove methyl groups to generate acid pectin; acid hydrolysis of pectic acid by pectin enzymes and pectin acid lyases degradation generated galacturonic acid.