Missorting of Pma1 is blocked in gga1Δ gga2Δ cells, but Pma1 is not ubiquitinated in vma3Δ cells. A, gga1Δ gga2Δ (left panel) and aps1Δ (right panel) cells bearing Pma1-GFP were grown in SC minus uracil with 2% glucose or 2% raffinose. GFP fluorescence and DIC images are shown in top and bottom panels, respectively. B, cells bearing pMET-HA-Pma1 (pS1) or pMET-HA-Pma1–7 (pS3) were derepressed for 3 h at 37 °C to express tagged Pma1 or Pma1–7. HA-Pma1 or HA-Pma1–7 was immunoprecipitated with anti-HA antibody, and immunoprecipitations were analyzed by Western blot with anti-ubiquitin (top) followed by anti-HA (bottom). The position of HA-tagged Pma1 is indicated by the arrow.