PRODUCTION Of NUTRIENT SOURCES FOR RHIZOBIUM

amylase systems of the yeast species (Table 8). Of special interest are the species secreting amylase
systems that enable extensive starch hydrolysis. This is usually accomplished by the concerted action
Table 7. Classification of major enzymes involved in starch breakdown.
EC Recommended
Number name a
3.2.1.1 α-Amylase 1, 4-α-D-Glucan
glucanohydrolase
Systematic name Origin b
3.2.1.2 β-Amylase 1, 4-α-D-Glucan
maltohydrolase
3.2.1.54 Cyclomaltodextrinase
(cyclodextrinase)
Cyclomaltodextrin
dextrinhydrolase
Reactions catalyzed
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A, B, Endohydrolysis of 1, 4-α-D
F, glucosidic linkages in starch,
P, Y glycogen, and related
polysaccharides and
oligosaccharides, liberating reducing
groups in α-configuration.
B, P Hydrolysis of 1-4-α-D-Glucosidic
linkages, successively, from the
nonreducing ends of starch,
glycogen, and related
polysaccharides and
oligosaccharides, producing β-Dmaltose.
B, Y Hydrolysis of cyclomaltodextrins to
linear maltodextrin, which can be
further hydrolyzed.