Confocal images of control and MCOLN1 shRNA-expressing HN31 cells treated with the cholesterol sensor, filipin. Scale bar (10μm) shown in the panel on the top applies to both panels. Bar graph showing the quantification of the internalized filipin staining in HN31 cells after MCOLN1 knockdown. All values represent mean±SEM. Data points represent values from biological replicates. Statistical test employed was Student's t-test. 