This is a family of glycosyl-hydrolases of the CAZy GH130 family. Several have been characterized as mannosylglucose phosphorylase. This enzyme is part of the mannan catalytic pathway and feeds into the glycolysis cycle. Specifically it catalyzes the reversible phosphorolysis of beta-1,4-D-mannosyl-N-acetyl-D-glucosamine. This family was noted to belong to the Beta fructosidase superfamily in.