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. Author manuscript; available in PMC: 2012 Oct 1.
Published in final edited form as: Peptides. 2011 Aug 22;32(10):2058–2066. doi: 10.1016/j.peptides.2011.08.014

Figure 6. Hypothetical model for VIP receptor axis in the thymus.

Figure 6

Once recruited to the CMJ, ETP cells show exclusive, high VPAC1 levels, which are downregulated upon DN2 differentiation. DN2 and DN3 cells show a coordinate upregulation of VPAC2 expression. VIP receptor levels are restored during later differentiation stages, with VPAC1 levels predominating.