Figure 3.

Sox9 expression in pluripotent, fetal, and adult stem and progenitor cells. Sox9 is expressed throughout development, initially in pluripotent founder cells and subsequently in ectodermal, endodermal, and mesodermal derivatives. Sox9 expression is maintained in fetal and adult tissues derived from Sox9+ fetal progenitor cells and also in differentiated cells in some cases.26, 27, 28, 29, 30, 31, 32, 39, 40, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101.