Facilitative glucose transporter that can also mediate the uptake of various other monosaccharides across the cell membrane. Mediates the uptake of glucose, 2-deoxyglucose, galactose, mannose, xylose and fucose, and probably also dehydroascorbate. Does not mediate fructose transport. D-glucose(out) = D-glucose(in) D-galactose(in) = D-galactose(out) Deoxyglucose transport is inhibit by D-glucose, D-galactose and maltose. Galactose transport is inhibited by D-glucose and maltose. Localized to densely spaced patches along neuronal processes. Detected in placenta. Transport is mediated via a series of conformation changes, switching between a conformation where the substrate-binding cavity is accessible from the outside, and a another conformation where it is accessible from the cytoplasm. Belongs to the major facilitator superfamily. Sugar transporter (TC 2.A.1.1) family. Glucose transporter subfamily.