Analysis of cultured T2AE cells (Ballard et al., 2010) and single‐cell transcriptomic and proteomic data from pulmonary fibrosis patients (Mayr et al., 2021) and recent human expression atlases (Tabula Sapiens Consortium et al., 2022; Travaglini et al., 2020) indicate that T2AE cells are a major source of CRTAC1. Here, CRTAC1 is linked to pulmonary fibrosis.