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The discreet region of interaction (yellow) between the fine processes of protoplasmic astrocytes. Pixels containing both greenand red were determined using the colocalization routine (see Materials and Methods) and then pseudocolored in bright yellow to mark their presence. x–y(large panel), x–z (bottom panel), and y–z (right panel) slices through the area in which two adjacent astrocytes interface. Scale bar, 20 μm.
