Immunofluorescence analysis for BRCA1 and SSEA4 in IPF lung biopsies and normal lung explants supported the transcriptomic results, in which there was a loss of BRCA1 and SSEA4 colocalization in IPF but not normal lungs (Fig. 5H–M and quantified in Fig. 5N). The gene discussed is BRCA1; the disease is idiopathic pulmonary fibrosis.