NF2 and meningioma: Immunoprecipitation and immunoblots validated β-catenin interaction with MerlinS13D but not MerlinS13A in meningioma cells (Fig. 3d), but in vitro recombinant protein binding assays showed that the Merlin NTD (irrespective of unphosphorylatable or phospho-mimetic substitutions at S13) was not sufficient for interaction with β-catenin (Supplementary Fig. 6b).