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Glucose travels across the cell membrane on a transport protein. Hereditary deficiency of GLUT-1, insulin -independent transporter, results in decreased glucose transport. Patients manifest with intractable seizures in infancy and a developmental delay. GLUT-1 transporter is expressed in which of the following cell types?

A. Liver, kidney and pancreatic β cells

B. Brain (neurons)

C. Adipose tissue, skeletal muscle and cardiac muscle

D. Erythrocytes, Blood -brain barrier, blood-retinal barrier

E. Intestinal epithelium, Spermatozoa.

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