Stem-cell line

Roughly 100,000 cells from rhesus macaques, grouped by similarity. Each colour highlights cells from a different tissue, e.g. thymus and lymph nodes (shades of blue), bone marrow (red), blood (white), tonsil (yellow), gut (shades of brown), brain (grey), liver (green), spleen (purple) and lung (pink).

A stem cell line is a group of stem cells that is cultured in vitro and can be propagated indefinitely. Stem cell lines are derived from either animal or human tissues and come from one of three sources: embryonic stem cells, adult stem cells, or induced pluripotent stem cells. They are commonly used in research and regenerative medicine.