Representative coronal slices from lumbar spinal cord show the presence of both TMR-Tat-P4-(C5)2 and TMR-Tat-C5 peptides (magenta) 1 hour after i.t. administration in naïve mice. Scale bar 200µm. DH dorsal horn, VH ventral horn. Insert zooms of merged channels (right panels), scale bar 50µm. 