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Selective retrieval of a targeted cell from the array by a microneedle. (A) Ba/F3 cells were trapped on the array and stained with Oregon Green 488. A targeted cell is indicated by an arrow. (B) Localized deformation was caused by a needle (asterisk). (C) The cell was released from the array leaving an empty microwell. (D) The targeted cell was collected in a Petri dish. Its elongated shape was due to its deformation while held in the microwell (see Fig. 2C). Scale bar = 20 μm.
