Mast cells expressing MMCP-5 or MMCP-6 mRNA in the skin of +/+ and mi/mi mice. Serial sections from the skin of a +/+ mouse (A and B, E and H) and a mi/mi mouse (C and D, G and H). (A, C, E, and G) Stained with alcian blue and nuclear fast red; (B and D) in situ hybridization with MMCP-5 probe; (F and H) in situ hybridization with MMCP-6 probe. Arrowheads show identical cells in each set of serial sections. Original magnification × 400.