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Migration of P. polycephalum using various patterns of hydrophobic barriers. (a) Schematic illustration of 5 different shapes (complete barrier, single-slit barrier, taper barrier, dumbbell barrier, and one-side-opened rectangular barrier). Photographs of P. polycephalum with (b) complete barrier, (c) single-slit barrier, (d) taper barrier, (e) dumbbell barrier, and (f) one-side-opened rectangular barrier after 48 h of incubation. The scale bar represents 1 cm.
