Fig. 9. Coupling of different subcellular structures to fit biological and physical needs for repeat ultrafast contraction and extension of S. minus cells.

(A) Distribution patterns of four core components. Grooves on the cell surface are indicated by the wavy line. Green: Cilia and basal bodies. Fused red and purple lines: Mesh-like contractile fibers comprising the GSBP-spasmin complex. ER, endoplasmic reticulum; M, mitochondria. (B) Putative GSBP-spasmin protein complex. Red curve, GSBP protein; purple cycles, spasmins.