The Nobel Prize winner Roderick MacKinnon suggested that ion channels were like rigid tubes through which molecules of varying size move. Now it seems that he was wrong: a team of scientists from SISSA Trieste and the Elettra Sincrotrone Trieste at AREA Science Park used the most robust technique in this field, X-ray crystallography, to watch ionic channels to change their diameter as they adjust to the size of the ions crossing them.
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X-raying ion channels