2.7.11.15 beta-adrenergic-receptor kinase alveolar cell type I i.e. AT1 cells, from transdifferentiation of AT2 cells 662563 3.4.17.12 carboxypeptidase M alveolar cell type I - 697395 3.4.21.122 transmembrane protease serine 2 alveolar cell type I Tmprss2 and Tmprss4 are coexpressed in alveolar and bronchial regions 754551