 (G) CHO-K1 Tet-On cells expressing Z α1-antitrypsin were induced with doxycycline (0.5μg/ml) for 48 h. Cells were incubated with 10μM GSK716 (or 0.1% v/v DMSO for the control) during the induction. Culture media containing either the experimental compound or DMSO were changed every 24 h. After the induction, cells were labelled for 10 minutes with 35S Met/Cys and chased at the indicated times. Culture media were collected and cells lysed in 1% v/v NP-40 buffer. Intracellular fractions and culture media from cells expressing Z α1-antitrypsin were immunoprecipitated either with a mAb against total α1-antitrypsin (3C11) or with a polymer-specific mAb (2C1). Samples were resolved by 4-12% w/v acrylamide SDS-PAGE and detected by autoradiography. (H) The graphs show the effect of GSK716 on intracellular and extracellular Z α1-antitrypsin (mean±SEM, n=2) 