aldose 1-epimerase

al·dose 1-e·pim·er·ase

(al'dōs ep'i-mĕr-ās),
An enzyme catalyzing the reversible interconversion of α- and β-aldoses (for example, α- and β-d-glucose); also acts on l-arabinose, d-xylose, d-galactose, maltose, and lactose.