Method for measuring 1,5-anhydroglucitol and reagent composition for measuring 1,5-anhydroglucitol

The object of the present invention is to (a) a protein comprising the amino acid sequence represented by SEQ ID NO: 2; (b) one or several amino acids deleted, substituted and / or added in the amino acid sequence represented by SEQ ID NO: 2 A protein having a sorbose dehydrogenase activity; or (c) a protein having an amino acid sequence having at least 60% sequence homology with the amino acid sequence represented by SEQ ID NO: 2 and having a sorbose dehydrogenase activity It is to provide a method for measuring 1,5-anhydroglucitol, characterized in that