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PRODUCTION Of NUTRIENT SOURCES FOR RHIZOBIUM

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Table 7. (continued).<br />

EC Recommended<br />

Number name a<br />

3.2.1.3 Exo-1,4-α-D-<br />

Glucosidase (glucoamylase,amyloglucosidase)<br />

3.2.1.20 α-D-Glucosidase<br />

(maltase)<br />

3.2.1.41 Pullulanase (debranching<br />

enzyme,<br />

limit dextrinase,<br />

R-enzyme)<br />

Systematic name Origin b<br />

1, 4-α-D-Glucan<br />

glucohydrolase<br />

α-D-Glucoside<br />

glucohydrolase<br />

Pullulan 6-glucanohydrolase<br />

Reactions catalyzed<br />

��<br />

A, B, Hydrolysis of terminal 1, 4-linked<br />

F, Y α-D-glucose residues, successively,<br />

from nonreducing ends producing β-<br />

D-glucose. Most forms of the enzyme<br />

also hydrolyze 1, 6-α-D-Glucosidic<br />

bonds next to an α-1, 4 linkage.<br />

More rapid action on poly- than on<br />

oligosaccharides.<br />

A, B, Hydrolysis of terminal,<br />

F, P, Y Nonreducing 1, 4-linked α-Dglucose<br />

residues with release of, α-<br />

D-glucose. Action on<br />

polysaccharides, if any, is very slow<br />

compared with oligosaccharides.<br />

B, P Hydrolysis of 1, 6-α-D-Glucosidic<br />

linkages in pullulan, amylopectin, and<br />

in α- and β- amylase limit dextrins<br />

of amylopectin. Limited action on<br />

glycogen.

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