Developmental BiologyDevelopmental CellPeer-reviewed
Sonic Hedgehog is not a limb morphogen but acts as a trigger to specify all digits.
Jianjian Zhu, Rashmi Patel, Anna Trofka…·Susan Mackem
This study shows Sonic Hedgehog (Shh) acts as a trigger for digit specification through a relay network rather than as a traditional morphogen.
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