Figure 4.

Basal body defects in uni1-3 cells shown in cross-sectional (A–J; proximal to distal, respectively) and longitudinal view (K–M). A stellate fiber array is assembled in the proximal region of the basal body (A and B) as well as in the transition zone (J). The basal body is formed from mostly doublet MTs, yet some triplets are evident at its distal tip (F, arrows). In longitudinal view, the stellate fibers look like an osmiophilic H in the transition zone (M; tz). In this cell, a partial H is indicated in the basal body (K; ^*). rMTs (K) as well as membrane compartments of the CV are present. This abnormal basal body assembled a flagellum (K, fl). Bar, 100 nm.