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Science  09 Jul 1999:
Vol. 285, Issue 5425, pp. 163
DOI: 10.1126/science.285.5425.163e

Like nerve cells, researchers are learning, the immune system relays information via synapses—junctions where two cells hook up, triggering a cascade of reactions. In an article on p. 221, researchers train a video camera on fluorescence-labeled proteins to reveal how antigen-presenting cells hook up with T cells (a kind of immune cell) and tell them to proliferate. See the action by clicking on 15 movies posted on Science Online.

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