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Ribbon model of AQP1 structure. The side view of the monomer of AQP1 molecule showing the two short helices colored light blue (HB) and dark orange (HE) (a). Structure of AQP1 representing by four different presentation styles. The tetramer structure is shown from the extra cellular side (b). Schematic drawing of water channel AQP1 explaining water selectivity and fast water permeation (c). These figures were prepared based on Ref.24.
