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Fig. 5. Reactive astrocytosis in the lumbar cord of 6-month-old rats. Expression of GFAP in astrocytes. (A) Normal lumbar cord; (B) retinoid-deficient lumbar cord; (C) western blot of lumbar cord of 6-month-old rats, lanes: 1, normal lumbar cord lane 2, retinoid-deficient lumbar cord. The arrow indicates a protein band of the correct size. Similar data were obtained from four other normally fed rats and seven other retinoid-deficient rats.