In a recent study Moolamalla et al.56 found that the modifier and catalytic subunits genes of γ-glutamylcysteine ligase were downregulated in A549 (alveolar epithelial cells derived from lung adenocarcinoma), ACE2-induced A549, and normal human bronchial epithelial (NHBE) cells infected with SARS-CoV-2. Here, ACE2 is linked to lung adenocarcinoma.