Migration of injected cells at the injured spinal cord segment following 4 weeks of experimental period. (a) Representative densities of GFP protein in groups obtained through western blot analysis of tissue lysate. (b) Depiction of the quantitative expression of GFP protein relative to β-actin. Each bar represents the average of 4 samples in a group and error bars represent standard error. (c) Immunostaining for the location of transplanted cells at the injured spinal cord segment. The nuclei are stained blue and GFP protein is stained green, demonstrating the migration of transplanted cells. Each figure is obtained with a scale bar of 400 μm.