Fungal Cellulases VI. SUBSTRATE AND INHIBITOR SPECIFICITY OF THE fl-GLUCOSIDASE OF ST ACHYBOTRYS ATRA

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Abstract
A large number of compounds with glycosidic linkages have been tested as substrates for the ,8-glucosidase of Stachybotrys atm. The enzyme appears to be specific for ,8-glucosides and all configurational alterations to the D-glucopyranose ring or substitutions in it lead to non-substrates; phenyl-fl-thioglucoside is a substrate, however. Aryl-,8-glucosides have a higher affinity for the enzyme than alkyl-,8-glucosides and no hydrolysis of cellobiose by the enzyme can be demonstrated. arrha-Substitution in aryl-fl-glucosides leads to a marked decrease in the affinity between enzyme and substrate.

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