The zoo of the gene networks capable of pattern formation by extracellular signaling.

Gene network topologies that can generate spatial patterning via extracellular signaling in multicellular systems fall into only three fundamental classes and their combinations.

• Why it matters: Developmental pattern formation depends on extracellular communication interpreted by intracellular gene networks, but the principles and classification of which network structures can work remain unclear.
• What they did: The authors combine logical arguments with mathematical proofs to derive constraints on feasible network topologies and to group them by shared dynamics and pattern-transformation capacity.
• The result: Networks within each class follow the same underlying logic for pattern formation, implying similar pattern outcomes and enabling a “zoo” that includes both reported and not-yet-tested topologies.

AI summary of the abstract · may contain errors · not medical advice · read the paper.