Lecture%205

Lecture%205 - Lecture 5 Relative Permeabilities of Lipid...

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Lecture 5
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Relative Permeabilities of Lipid Bilayers
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Membrane Permeability Coefficients(cm/sec) (in cm/sec )
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Carrier and Channel Proteins
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Open/ Closed States of an Ion Channel
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Gating of Ion channels
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A Chemical Synapse
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Scanning EM of Neuromuscular Junction
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Three Conformations of the Acetylcholine Receptor
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Structure of the Acetylcholine Receptor
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Ion Channels at the Neuromuscular Junction
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Sodium and Potassium Channels Sodium channels: Gated by either voltage or ligand binding Gated by membrane potential Potassium channels: Gated by membrane potential, ATP, second messengers
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Bacterial K + Channel: X-Ray Data (Doyle et al. 1998 Science 280: 69-77.)
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Bacterial K + Channel: X-Ray Data
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A Bacterial K + Channel: Model
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A Model for Gating of a Bacterial K + Channel
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Conformational Change of a Carrier Protein
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Three Types of Carrier-Mediated Transport
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Solute transport against a concentration gradient is essential for: Survival in environments where food concentrations are low
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Lecture%205 - Lecture 5 Relative Permeabilities of Lipid...

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