The Nobel Prize in Chemistry 2003 Navigate to: Summary- Peter Agre- Roderick MacKinnon Prize announcement Press release Popular information Advanced information Award ceremony speech Award ceremony video Banquet video The Nobel Prize in Chemistry 2003 The cell’s contact with the outer world The wall that separates a cell from its surroundings – the membrane – is not an impermeable shell. It is pierced through by various sorts of channel. The channels consist of proteins, each with its own function. Contents: | Introduction | The cell’s contact | Water channels | Ion channels | Cells signal with salt | Timeline | Further reading | Credits | Web Adapted Version of the Nobel Poster from the Royal Swedish Academy of Sciences Go to the top of the page