Inductive interactions:
veg1-to-veg1 signal
| INDUCER: | veg1 |
| TARGET: | veg1 |
| STAGE: | Mid-cleavage - mid-blastula |
| INDUCTION OUTCOME: | promotion of endoderm gene expression within the veg1 domain |
| PROOFS: | A single veg2 blastomere combined with veg1 tier in veg1-mesomere recombinants suffices in some embryos for the formation from the veg1 cells of a complete archenteron |
| SPECIES: | Strongylocentrotus purpuratus |
| COMMENTS: | One veg2 blastomere contacts with one or two of veg1 blastomeres, thus they must communicate with one another |
| REFERENCE: | Logan and McClay, 1998 |
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