Abstract: A method of increasing the relative number of cells expressing one or more stem cell markers in a cell population including committed cells is described. The method comprises: i. contacting the cell population with an agent that operably engages said committed cells; and ii. incubating committed cells that are engaged by said agent such that the relative number of cells expressing one or more stem cell markers increases as a result of said engaging.
Abstract: Disclosed is a method of preparing an undifferentiated cell. The method includes contacting a more committed cell with an agent that causes the more committed cell to retrodifferentiate into an undifferentiated cell.
Abstract: A method of increasing the relative number of CD34.sup.+ cells in a cell population is described. The method comprises contacting the cell population with an agent that causes the relative number of CD34.sup.+ cells to increase.