PtK1 cells were found to form groups of variable size which locomoted in unison. A continuous spectrum of net displacements during two days of observation ranged from no displacement to about 150 μm/day. The majority of single cells migrated less than 50 μm/day. The phenomenon demonstrates in tissue culture the existence of a form of cellular migration which appears intermediary between single cell locomotion and the deformations of extended sheets of cells  in the sense that more than one single cell but less than an entire sheet displace themselves. It also suggests coordination of locomotion between individual cells.
ASJC Scopus subject areas
- Cell Biology