adult stem cell line cell hematopoetic stem cell line cell Of the types of adult stem cells have successfully been isolated and identified, only mesenchymal stem cells can successfully be grown in culture for long periods of time. Hematopoietic stem cells are difficult to grow and propagate in vitro.[4] Identifying methods for maintaining hematopoietic stem cells in vitro is an active area of research. Reference: https://en.wikipedia.org/wiki/Stem-cell_line YH, AD An adult stem cell line cell that is isolated and prepared using bone marrow tissue and is able to generate all cells of the immune system and all blood cell types. https://en.wikipedia.org/wiki/Stem-cell_line