Fig. 3
From: Clinical and genetic aspects of primary ciliary dyskinesia/Kartagener syndrome

Electron micrographs of nasal cilia from patients with primary ciliary dyskinesia (PCD) illustrating dynein defects. Far left panel illustrates ultrastructure of a normal cilium from nasal epithelium of a healthy, clinically unaffected subject. The adjacent panels from three different patients with PCD illustrate defects in both dynein arms, isolated defects of outer dynein arms only, and isolated defects of inner dynein arms only.