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Grafted human lt-NES cell–derived cortical neurons establish asymmetric synapses with host neurons in the contralateral somatosensory cortex of stroke-injured rats. Synapses with continuous (A) and perforated (B) postsynaptic densities (red lines) between host dendritic spines (ds, brown) and grafted GFP+/DAB+ presynaptic axon terminals (at, green). (Scale bar, 0.2 μm.)
