Length distribution of IFT trains in WT and fla14 flagella. (a) Table of the number of clearly identifiable and measurable long and short IFT trains in WT and fla14 flagella. (b and c) Histograms of the length distributions of IFT trains in flagella of WT (b) and fla14 (c) cells. The arrows mark the mean length (±SD) of the long (grey) and short (black) IFT trains.