Food Biochemistry and Food Processing

6 Enzyme Classification and Nomenclature 149

Table 6.4.Common Enzyme Group Terms Used in the Food Industry

Group Term Selected Enzymes in This Group

Carbohydrases Amylases (EC 3.2.1.1, 3.2.1.2, 3.2.1.3)
Pectic enzymes (see below)
Lactases (EC 3.2.1.108, 3.2.1.23)
Invertase (EC 3.2.1.26)

-Galactosidases (EC 3.2.1.22, 3.2.1.23)
Cellulase (EC 3.2.1.4)
Hemicellulases (EC not known)
Dextranase (EC 3.2.1.11)

Proteases Serine proteases (EC 3.4.21)
(Endopeptidases) Cysteine proteases (EC 3.4.22)
Aspartic proteases (EC 3.4.23)
Mettaloproteases (EC 3.4.24)

Proteases Aminopeptidases (EC 3.4.11)
(Exopeptidase)

Proteases Carboxypeptidases (EC 3.4.16)
(Carboxypeptidases) Metallocarboxypeptidases (EC 3.4.17)
Cysteine carboxypeptidases (EC 3.4.18)
Dipeptide hydrolases (EC 3.4.13)

Oxidoreductases Polyphenol oxidase (EC 1.10.3.1)
Peroxidase (EC 1.11.1.7)
Lactoperoxidase (EC 1.11.1.7)
Catalase (EC 1.11.1.6)
Sulfhydryl oxidase (EC 1.8.3.2)
Glucose oxidase (EC 1.1.3.4)
Pyranose oxidase (EC 1.1.3.10)
Xanthine oxidase (EC 1.1.3.22)
Lipooxygenase (EC 1.13.11.12)
Dehydrogenases (see below)
Alcohol oxidase (EC 1.1.3.13)

Pectolytic enzymes Pectin (methyl) esterase (PE, EC 3.1.11.1)
(Pectic enzymes) Polygalacturoniases (PG, EC 3.2.2.15 or 3.2.1.67)
Pectate lyases or pectic acid lyases (PAL)
(Endo-type, EC 3.2.1.15 or 4.2.2.2)
(Exo-type, EC 3.2.1.67 or 4.2.2.9)
Pectic lyase (PL, EC 4.2.2.10)

Heme enzymes Catalase (EC 1.11.1.6)
Peroxidase (EC 1.11.1.7)
Phenol oxidase (Monophenol monooxygenase, EC 1.14.18.1 ?)
Lipoperoxidase (EC 1.13.11.12)

Hemicellulase Glucanases (EC 3.2.1.6, 3.2.1.39, 3.2.1.58, 3.2.1.75, 3.2.1.59, 3.2.1.71, 3.2.1.74,
3.2.1.84)
Xylanase (EC 3.2.1.32) (Continues)