The start button sits in the middle of the drive buttons and works only when a smooth rectangle key fob is inserted fully into the slot and held down.

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While the booklet was inserted in the New York Times on Thursday, it was not inserted in newspapers in some key markets such as Boston or Washington and had to be obtained in-store at the registers.

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Cells have receptors on their surface that, when the right key (or ligand) is inserted, cause them to change.

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The key use for the gel, however, is likely to be in medical devices that are inserted into the body (pace makers, hip implants, catheters, and so forth), on which biofilm infections can grow and be particularly dangerous.

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