Fig. 4. Schematic illustrations of the movement of the model cell (Table 1). Cell motility variables and abbreviations are given in Table 1. The cells are viewed along the Y_I axis except in G, which is viewed along the X_I axis (see Fig. 2). The position and orientation of the cell is shown at intervals of 0.25 s, except F, where the time interval is 1 s. The spheres representing cells are divided into eight regions labelled (from left to right) 1-4 and 5-8 on the upper and lower hemispheres, respectively. Arrows indicate the swimming trajectory and direction of turning. (A) LF+h2TF, (B) LF+h9TF, (C) LF+Stf, (D) h2TF, (E) h9TF, (F) Stf, (G) LF.