Extended Data Fig. 2: Immunofluorescence analysis of human FOXN1 expression in 3D iPSC-TECs.

Immunofluorescent images of 3D iPSC-TEC aggregates stained with antibodies against human FOXN1 (red) and counterstained with Hoechst 33342 for nucleus (blue). Primary human thymic epithelial cells and lymph node fibroblasts were used as positive and negative controls, respectively. White scale bar, 25um. Shown are representative images from three independent iPSC-TEC differentiations with similar results.