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Migration tracks of PLBs in response to the chemoattractant fMLP. Tracks show PLBs migrating across the cell-gel interface at varying locations up and down the channel and further into the gel region. Control devices (nor shown) demonstrated no migration. Migration of PLBs to fMLP in the top and bottom chemoattractant port (Top Row). Migration of PLBs to fMLP in only the top port (Bottom Row)
