MKI67 and neoplasm: Simultaneously, immunohistochemistry of the tumor derived from miPS-PGE2P cells showed strong immunoreactivity to anti-E-cadherin, -Ki67, and -CD44 antibodies indicating high proliferation rate with CSC subpopulation as well as heterogeneous intercellular adherence while teratoma section did not show any of these immunoreactivities (Fig. 3E).