Fig. 2.

a mRNA level of estrogen receptor (ER)α and ERβ at the left posterior cerebral artery. The level was determined by quantitative real time-PCR and normalized by the glyceraldehyde 3-phophate dehydrogenase (GAPDH) mRNA level. n = 7 per group, *p < 0.05 (Scheffe’s test). Data are the mean ± SD. b Immunohistochemical staining for ERα and ERβ in the left posterior cerebral artery