Main Reaction: hydroquinone + maltose >> α-Arbutin + glucose

Reference: PubMed ID: 16233209
Authors: Kurosu J, Sato T, Yoshida K, Tsugane T, Shimura S, Kirimura K, Kino K, Usami S
Title: Enzymatic synthesis of alpha-arbutin by alpha-anomer-selective glucosylation of hydroquinone using lyophilized cells of Xanthomonas campestris WU-9701.
Published: 2002

hydroquinone + maltose --> α-Arbutin + glucose