"Results show that TM9SF4 controls the sorting of TMDs at the ER-Golgi interface. Remarkably sorting of T-R1 in HCT116 cells was different from that in HEK cells: in HCT116 cells a substantial fraction of T-R1 was localized to the Golgi complex and it was relocated to the ER by genetic ablation of TM9SF4."xsd:string