has_specified_input has_specified_input has_specified_output has_specified_output culture medium material maintenance cell freezing medium cultured cell population maintaining cell culture OBI branch derived PlanAndPlannedProcess Branch When harvesting blood from a human, isolating T cells, and then limited dilution cloning of the cells, the maintaining_cell_culture step comprises all steps after the initial dilution and plating of the cells into culture, e.g. placing the culture into an incubator, changing or adding media, and splitting a cell culture a protocol application in which cells are kept alive in a defined environment outside of an organism. part of cell_culturing maintaining cell culture pending final vetting