From ZHBTc4 ESCs, EBs were created by the hanging-drop method, starting with 1000 cells/drop. After 2 days in the drop state, each drop begins to grow on a non-coated sterile cover glass for immunocytochemistry, and on a round-shaped 96-well plate for live-cell imaging. In all culture situations, media were fed through addition per day and plate movement was also fixed to a minimum for minimizing the physical impact on the EBs. All EBs were cultured using ESC media without LIF.
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