ERP29 and cystic fibrosis: With regards to the KDEL-R having a role in anterograde ER→Golgi trafficking via COP II, our group has recently found that ERp29 likely interacts with KDEL-R1 as part of the anterograde trafficking of the epithelial sodium channel (ENaC) in CFBE41o- CF bronchial epithelial cells and MDCK renal epithelial cells (Bikard et al., 2019).