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CS GAGs in Human, Cat, and Rat Spinal Cords. CS GAG disaccharide standards, Δ6S and Δ4S (lane 1), and purified bovine tracheal CS (lane 5) were used as controls. In human (lane 2) and cat (lane 3) spinal cord tissue, two predominant lyases, Δ6S and Δ4S, are apparent. A single dominant lyase, Δ4S, is present in the rat (lane 4).
