Twist of central pair microtubules in the flagellum of the green flagellate Scourfieldia caeca.
D000818:Animals; D056890:Eukaryota / Q000648:ultrastructure*; D005407:Flagella / Q000648:ultrastructure*; D008854:Microscopy, Electron; D008870:Microtubules / Q000648:ultrastructure*