title: Origin of necklace particles in thymic ciliating cells.
abstract: The formation of ciliary necklaces during ciliogenesis in a thymic cyst was observed in freeze-etched replicas. The necklaces first appear as clusters of particles arranged in concentric circles on a flat area of the cell membrane. As soon as the cilium begins to grow, the particles move to the periphery.
mesh_terms: D000818:Animals; D002923:Cilia / Q000648:ultrastructure*; D005614:Freeze Fracturing; D051379:Mice; D013950:Thymus Gland / Q000648:ultrastructure*