has part has_specified_output immortal cell line cell line immortalization A immortalizing genetic transformation of an existing population of cell line cells is required as part of this process, as are additional steps for selecting and propagating the cells output form this process into a cell line. Bjoern Peters OBI Production of a cell line for the purposes of experimentation e.g. EBV transformation of PBMs an establishing cell line process whereby a mortal cell line is intentionally genetically modified to be capable of indefinite propagation and re-established as a new immortal cell line cell line immortalization 4-20-13 MHB: This class was repositioned as a child of 'establishing cell line', based on the existing definition ("the planned process of experimentally creating a cell line which is capable of dividing indefinitely in vitro"), and examples and other annotations indicating the intent to describe a process through which a new immortal cell line is established from an existing mortal cell line using genetic modification techniques. The definition above was modified to clarify this perspective. 'establishing immortal cell line through directed genetic modification' establishing cell line immortalizing cell line transformation metadata incomplete