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Identity of Bmp4 and Bmp7 expressing cells in the thymus. X-gal-based detection of lacZ gene reporter activity for Bmp4 (a–d) and Bmp7 (e–h) (blue) on thymus sections combined with immunohistochemical staining for for CD3 (a, e), CD25 (b, f), DEC-205 (c, g), cytokeratin8 (CK8) (d, h) (red or brown). c, cortex; m, medulla; sc, subcapsular zone (size bar 50 μm).
