has_specified_output establishing primary cell culture Cells are originally plated at a certain concentration referred to as seeding density. Upon a first passage this primary culture becomes a secondary cell culture that can be propagated to become a stable and homogneous cell line. This class covers establishment of primary cultures from any native cell - 'in vivo' cells isolated from some multicellular organism, or 'in environment' unicellular organisms isolated from some natural environment. Effects of establishing cell cultures and cell culture conditions on the proliferative life span of human fibroblasts isolated from different tissues and donors of different ages. Exp Cell Res. 2002 Apr 1;274(2):275-87. PMID: 11900488 When harvesting blood from a human, isolating T cells, and then limited dilution cloning of the cells, the establishing_cell_culture step comprises preparing the cells at a certain dilution and plating them in a container with growth medium. PERSON: Matthew Brush an establishing cell culture process whereby cells explanted directly from an organismal source or specimen, and placed in culture for maintenance or propagation as a primary cell culture establishing primary cell culture primary cultured cell population establishing cell culture metadata complete