Isolated blastomeres are reapposed in chosen combinations to test induction. Reciprocal wild-type and mutant combinations can separate a signalling-cell defect from a responding-cell defect.
An early posterior Caenorhabditis elegans blastomere that contacts EMS and provides inductive information required for normal endoderm specification.
The sister of the E blastomere in Caenorhabditis elegans. Its descendants include muscle and part of the pharynx; it is not the normal intestinal founder.
The founder of the Caenorhabditis elegans intestinal lineage. Following its descendants distinguishes failure of endoderm specification from a failure of terminal differentiation.
The early Caenorhabditis elegans blastomere that divides into MS and E. Its daughters normally produce predominantly mesodermal derivatives and the intestine, respectively.
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