Figure 2

Immunohistochemical localization of NGF ligand and receptors in ovaries of the wild ground squirrel during breeding and nonbreeding periods . The first column (a, e, i) represents negative control samples of the breeding season ovary, corpus luteum and nonbreeding season ovary; the second column (b, f, j), the third column (c, g, k), and the fourth column (d, h, l) represent immunostaining with antibodies against NGF, TrkA and p75, in the breeding period ovary, corpus luteum and nonbreeding period ovary. B, breeding period; NB, the nonbreeding period; GC, granulosa cells; TC, theca cells; IC, interstitial cells; LC, luteal cells. Scale bar, 50 μm.