Abstract
The ability of 58 yeasts and yeast-like organisms representing 44 genera to deacetylate 1,6-anhydro-2,3,4-tri-0-acetyl-β-d-glucopyranose was investigated.Aureobasidium pullulans strains can perform this deacetylation selectively.A. pullulans CCY 27-1-11 and 27-1-14 release preferentially the acetyl group in position C(4), whereas the subspeciesA. pullulans CCY 27-1-14a (with no pigmentation) preferentially releases the acetyl group in position C(2).A. pullulans cells catalyzing the selective deacetylation of 1,6-anhydro-2,3,4-tri-O-acetyl-β-D-glucopyranose were permeabilized and immobilized on a matrix of polyethyleneimine cross-linked with 2-chloromethyloxirane.
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