Fig. 5.

Scanning electron microscopy of the strains CP021 and S13. a Joint flagella during cytotomy in CP021. b Non-dividing cell of S13: the second flagellum is attached only by its tip. c Lateral view of the tip of the second flagellum tightly connected to the first one in S13. d Top view of the second flagellum’s tip in CP021; note the elongated distal part and lateral extensions. e Detaching flagellar tip in S13. f–j Free flagellar tips in CP021 (f–h) and S13 (i, j). White arrowhead—tip of the second flagellum; black arrowhead—lateral extension of the flagellar tip. Scale bars: a, b 10 μm, c–j 1 μm