Immunohistochemistry of CCNE1 on ovary tumor specimensA. Normal ovary tissue. B. Benign ovary tumor tissue. C. Clear cell type of ovary tumor specimen. D. Serous type of ovary tumor specimen. E. Mucinous type of ovary tumor specimen. F. Endometrioid type of ovary tumor specimen. Cyclin-dependent kinase 2 is an ideal target for ovary tumors with elevated cyclin E1 expression. Yang L, Fang D, Chen H, Lu Y, Dong Z, Ding HF, Jing Q, Su SB, Huang S - Oncotarget (2015). Not Altered. CC.