... zygote intercellular bridges midbodies clonal analysis ionic coupling dye coupling lineage labelling embryonic-abembryonic axis DiI fluorescein complexon Spatial patterning of the egg has been implicated in early development in a sufficient variety of invertebrates and vertebrates...

... with a different character from that induced by XTC-MIF, produced no episode of pattern formation at all when tested in the procedure described in this paper. Organiser status of grafts that have been exposed to mixtures of the two factors is set entirely by the supplied XTC-MIF concentration. Lineage labelling...

... pole tissue was lineage labelled with FLDx in order to ascertain the provenance of the structures formed. The normal fate of the AP region was determined by orthotopic grafts at stages (early blastula), 8 (mid blastula) and 10 (early gastrula). At later stages most of the labelled cells were found...