Various surface markers are used to identify stem cells, depending on their type:
1. ESCs: Common markers include SSEA-4, TRA-1-60, and TRA-1-81. 2. ASCs: CD34 for hematopoietic stem cells, CD90 and CD105 for mesenchymal stem cells. 3. iPSCs: Similar to ESCs, they express markers like SSEA-3, TRA-1-60, and TRA-1-81.
