There are no water molecules between the ions in the selectivity filter of potassium

Do only potassium ions pass through the selectivity filter of a potassium channel, or are there water molecules between the ions? This question has been a source of controversy for years. Researchers led by Prof. Adam Lange from the Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP) …
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Enlace: There are no water molecules between the ions in the selectivity filter of potassium