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Comparison of localization between positive signals for immunohistochemical and TUNEL staining on two groups of consecutive sections (A–C) and (D–F). Pentosidine immunoreactivity is localized in the cytoplasm of oocytes (A, E). TUNEL positivity is in the nucleus of oocytes (B, F). Ubiquitin immunoreactivity is localized in the cytoplasm and nucleus of oocytes (C). Caspase 12 is mainly localized in the nucleus of an oocyte (D). Bar=50 µm.
