Some characteristics of regioselectivity and acceptor tolerance in transgly
cosylation reactions, catalysed by a crude culture filtrate from Thermoascu
s aurantiacus, were examined by employing methanol and monosaccharides as a
ccepters. When beta-D-mannopyranosyl fluoride was employed as the donor, th
e anomeric configuration of the newly formed bond was found to depend on th
e structure of the acceptor used. (C) 2000 Elsevier Science Ltd. All rights
reserved.