Proliferating microglia/macrophages in the post-ischaemic SEZ. Figure showing immunostained areas of the SEZ in high magnification. The vast majority of proliferating cells (marked with Ki67 + in A and B, or PH3 in C and D, all in red) is negative for IB-4 (in green in all photos), either in sham-operated (A and C), or in post-ischaemic (4 weeks after the insult, B and D) rats. One exception is highlighted by the white arrowhead in B. [e: ependymal cell].