Quantification of autophagosomes motility from live cell microscopy (Supplementary Movie 1) from mCherry-LC3B L6 cells under basal, iron (250 µM, 24 h) and starvation (amino acid free) condition. Experiments were performed three times, and one representative experiment is presented here. *P < 0.05 (unpaired Student's t-test compared to Iron 24h). 