text_1: Ectopic expression of Sall4, Nanog, Esrrb, and Lin28 generates induced pluripotent stem cells from mouse embryonic fibroblasts more efficiently than other factor combinations.
text_2: Induced pluripotent stem cells (iPSCs) are commonly generated by transduction of Oct4, Sox2, Klf4, and Myc (OSKM) into cells.