Definition of "impermeant" []

• That cannot permeate through a specified semipermeable membrane (adjective)

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• "Some molecules move freely across the membrane, some are impermeant or very slowly permeant, and some move across the membrane depending upon pH."
• "Organelles are bounded by impermeant, lipid-rich membranes that ensure the physical and functional separation of vital biochemical processes."
• "When the researchers introduced its associated membrane-impermeant fluorogen, it bound to the FAP-tagged GPCR on the cell surface, emitting a bright fluorescent glow."