Immunohistochemical localization of the cell markers in mouse ovaries. Immunohistochemistry of (a) Flk-1, (b) F4/80, (c) fibronectin, (d) laminin, (e) tenascin, (f) collagen type IV, (g) THY1, and (h) CYP 17A-1 in mouse ovaries. (a, b, d-h) visualized by immunofluorescence and (c) visualized by ABC staining. O, oocyte; G, granulosa cells; T, theca cells. Scale bars = 25 μm.