Jiang, Y.-J., Smithers, L., and Lewis, J. (1998) Vertebrate segmentation: The clock is linked to Notch signalling. Current biology : CB. 8(24):R868-R871.
The periodic formation of somites during vertebrate segmentation has been suggested to involve a molecular 'segmentation clock'. Recent observations of cyclic Lunatic fringe expression in chick and mouse embryos link the segmentation clock to Delta?Notch signalling.