Scientists are now able to "see" a structure that acts as an atomic-size sorter for cells. Without it, many important life functions—nerve signal firing, heartbeat, hormone secretion—could not occur.
Researchers reveal how the presence of bulky aromatic amino acids at positions 1 and 3 of the aromatic/arginine selectivity filter determines urea and boric acid permeability in Aquaporin 10 paralogs.
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