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. 2019 Aug 20;13:381. doi: 10.3389/fncel.2019.00381

FIGURE 2.

FIGURE 2

Putative model describing the signaling pathways and other genes suggested to be involved in bRG generation. Canonical pathways currently demonstrated to promote bRG production include the FGF-MAPK axis, PDGFD signaling, PTEN/AKT/mTOR, and SHH pathways. Human/hominoid specific genes depicted in this figure include TBC1D3, a RABGAP protein that promotes Erk signaling and appears to repress Trnp1 expression, and TMEM14B, a transmembrane protein that promotes IQGAP1 translocation to the nucleus to regulate cell cycle progression. ARHGAP11B and Aspm are not indicated here as their function are either unclear or they do not obviously fit in the pathways with current knowledge. AJ, adherens junction; ECM, extracellular matrix.