Internal and external factors that control changes in cell structure and function.

Another name for adult stem cells.

Cells with the ability to divide for indefinite periods in culture and to give rise to specialized cells.

Non-blood cells derived from blood organs, such as bone marrow or fetal liver, which are capable of supporting growth of blood cells in vitro. Stromal cells that make this matrix within the bone marrow are also derived from mesenchymal stem cells.

The process of growing and replating cells in tissue culture for many months.

Surface proteins that are unique to certain cell types, which are visualized using antibodies or other detection methods.