Mast cells expressing MMCP-4 mRNA in the skin of +/+,mi/mi, and tg/tg mice. Serial sections from the skin of a +/+ mouse (A and B), a mi/mi mouse (C and D), and atg/tg mouse (E and F). A, C, and E, stained with alcian blue and nuclear fast red; B, D, and F, in situ hybridization with MMCP-4 probe. In each set of serial section, arrows show identical cells that expressed MMCP-4 gene and arrowheads show identical cells that did not express MMCP-4 gene. Original magnification ×400.