Figure 3. The localization of CYP17A1, phospho-ERK1/2 (p-ERK1/2) and ERK1/2 by immunohistochemistry in the ovary of 21-day-old non-treated mice (A, E, I, M, Q and U), mice treated with PMSG for48 h (B, F, J, N, R and V) and mice treated with hCG for 8 h (C, D, G, H, K, L, O, P, S, T, I W and X). Bar=100 μm. TC, theca cells; GC, granulosa cells; arrowheads, CYP17A1 positive cells; arrows, p-ERK1/2 positive cells. n=5-8 in each group.