The present invention provides a stable lyophilized PQQ-dependent glucose dehydrogenase
composition comprising a PQQ-dependent glucose dehydrogenase together with (i)
at least one compound selected from the group consisting of aspartic acid, glutamic
acid, -ketoglutaric acid, malic acid, -ketogluconic acid, -cyclodextrin
and their salts and (ii) an albumin.
