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聽John Orlowski published a News & Views article in Nature () entitled 鈥�An ion transporter in sperm that has features of a channel鈥� that discusses two structural biology papers just published in Nature describing a unique Na⁺/H⁺ exchanger in sperm that has regulatory features (activation by voltage and cyclic nucleotides) more commonly found in ion channels and is essential for sperm motility and male fertility.