show Abstracthide AbstractWe inactivated RYBP, YAF2, TET1, TET2, and TET3 in bronchial cells, individually and in combination, and observed widespread DNA methylation by performing whole genome bisulfite sequencing. Overall design: Comparative DNA methylation analysis of WGBS data in HBEC3 defective cell (Control cells, RKO, YKO, TET2 KO, TET3KO, TET2/TET3 DKO, TET123 TKO and TET123/RYBP QKO )