BK and NMDAR are in nanoscale proximity. (A) Representative STORM images (top; scale bar = 5 µM) and magnified views of areas of interest (bottom; scale bar = 0.5 µM) showing the spatial distribution of BKα (green, Alexa Fluor 488) and GluN2B (red, Alexa Fluor 647) in HEK293T cells co-expressing BK, GluN1a, and either GluN2B^WT (left) or GluN2B^V618G (right). (B) NND analysis from the corresponding dual-label experiments indicated in the graph legend. (C) Cumulative probability analysis of NND distribution.