Figure 3.

Schematic drawings of centrin containing structures. (A) A basal body from a cortical row is represented along with some of the structures associated with it. bb, basal body; kf, kinetodesmal fiber; tm, transverse microtubules; pc, postciliary microtubules. (B) Some of the structures within the oral apparatus are represented. Um, undulating membrane; m, membranelles, of which there are three; or, oral-rib (gray in diagram); df, deep-fiber; ffr, fine-filamentous reticulum (striped in diagram). The undulating membrane and membranelles contain basal bodies and cilia. The oral-rib is a sheet of microtubules along the inside of the oral apparatus cavity beneath the undulating membrane, edged with ribbed walls (not labeled). The deep-fiber consists of a subset of microtubules that continue inward from the oral-rib into the cell. The fine-filamentous reticulum lies beneath the oral ribs.