Transforming Growth Factor- β (TGF-β) Superfamily
Synthesized inactive connected to a proregion, forms a disulfide-linked dimer once cleaved and activated - the bioactive portions dimerize and function as signalling molecule
Bone morphogenetic proteins
A type of TGF-β that inhibits other processes in the embryo, binds to bioactive dimers
Hedgehog family
Segment polarity in drosophila
Includes: desert, indian, and sonic hedgehog
Fibroblast Growth Family
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