The transcription factor NKX2-1 is a key regulator of lung pathophysiology, but the importance of its binding sites outside of proximal promoter regions is unclear. Here, William Stuart and Iris Fink-Baldauf et al. use CRISPRi to interrogate 19 NKX2-1 binding sites and identify specific sites important for breathing, innate immune defense, and tumorigenesis.
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