Evolution of the TGF-beta Signaling Pathway and Its Potential Role in the Ctenophore, Mnemiopsis leidyi

Figure 5. Summary of presence and absence of TGF-beta components.

The rows contain the different TGF-beta components. The columns represent the four early-branching lineages of the Metazoa, plus the Bilateria. Each row represents the presence (black dot) or absence (grey dot) of a particular component in the corresponding lineage. The box shows the absences shared by Porifera and Ctenophora.

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