Insulin-independent facilitative glucose transporter. D-glucose(out) = D-glucose(in) Localizes primarily perinuclear region in the absence of insulin. Detected at high level in spleen and skeletal muscle, intermediate levels in kidney, testis and mammary gland, and at lower levels in liver, lung and intestine. N-glycosylated. Belongs to the major facilitator superfamily. Sugar transporter (TC 2.A.1.1) family. Glucose transporter subfamily.