Question

what is Double displacement mabion​

Answer 1

Simplified scheme illustrating the retaining double-displacement mechanism used by the β-mannanases in this study. To the left, mannotetraose (M4) is shown bound in subsites − 2 to + 2 with the reducing end bound in subsite + 2. β-Mannanases may bind M4 in multiple binding modes, e.g., from subsites − 3 to + 1 (Rosengren et al. 2012), resulting in other products. The enzyme performs a nucleophilic attack instead the glycosidic bond between subsites − 1 and + 1, indicated by the arrow, and releases the mannobiose unit in subsites + 1 and + 2 (white) while the mannobiose unit in subsites − 1 and − 2 (gray) forms a covalent intermediate with the enzyme. The covalent intermediate (in the center) can then be attacked by water (HO–H), leading to hydrolysis, or an alcohol (HO–R), leading to alcoholysis and the production of a glycosyl conjugate (alkyl mannobioside) shown to the right. The dashed arrows show possible secondary hydrolysis of the glycosyl conjugate.

Answer 2

Answer:

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