A new beta-glucosidase, which was partially purified from Trichoderma viride cellulase, catalyzed a transglycosylation reaction of cellobiose to give beta-D-Glcp-(1-->6)beta-D-Glcp-(1 --> 4)-D-Glcp 1 and beta-D-Glcp-(1 --> 6)-beta-D-Glcp-(1 --> 6)-beta-D-Glcp-(1 --> 4)-D-Glcp 2, regioselectively. Furthermore, the enzyme converted laminaribiose and gentiobiose into beta-D-Glcp-(1 -->6)-beta-D-Glcp-(1 --> 3)-D-Glcp 3 and beta-o-Glcp-(1 --> 6)-beta-D-Glcp-(1 --> 6)-D-Glcp 4, respectively. Selective beta-(1-->6) transglycosylation was achieved.
Kishida, Etsu; Sone, Yoshiaki; Shibata, Satoaki, Agricultural and Biological Chemistry, 1989, vol. 53, # 7, p. 1849 - 1860