The following antibodies/antisera were used in this study. Actin (Cell Signaling Technology); Cer1GAG (mAbP3E9) [24 (link)]; fibrillarin (abcam ab4566), FLAG (Sigma Aldrich); GFP (Wako); PGL-1 (gift from Susan Strome), GFP (Wako); phospho Ser/Thr-Pro (abcam ab9344); ubiquitin (FK2, Enzo Life Sciences). The secondary HRP-conjugated anti-mouse antibodies were from Life Technologies.
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