- Chemokine C-Motif Ligand 2 (XCL2)
- Growth Differentiation Factor 1 (GDF1)
- Growth Differentiation Factor 5 (GDF5)
- Growth Differentiation Factor 11 (GDF11)
- Noggin (NOG)
- Collagen Type XXVII (COL27)
- Collagen Type XXV (COL25)
- Collagen Type XVIII (COL18)
- Glial Cell Line Derived Neurotrophic Factor Receptor Alpha 2 (GFRa2)
- Neurturin (NRTN)
- Persephin (PSPN)
- Glia Maturation Factor Beta (GMFb)
- Neuregulin 2 (NRG2)
- Neuregulin 3 (NRG3)
- Neuregulin 4 (NRG4)
