Another way to form an induced pluripotent stem cell is through reprogramming through cell extracts. This process involves reprogramming the somatic cell. Cell extracts are taken from a pluripotent stem cell, such as an embryonic stem cell and is inserted into the somatic cell. Chemicals are then used to remove the somatic cell membranes which are then incubated with cell extracts from an embryonic stem cell. The extract contains the pluripotent reprogramming factors which allows the cell to become pluripotent when it is used in the somatic cell.