(A,B) Confocal pictures of LX2 fixed cells immunostained for the KATP channels subunit SUR2A and counter-labeled with (A) NRB-AF12 or (B) ER-Tr green. (C,D) Immunostaining of LX2 cells for SUR2B subunit of KATP channels; cells were counter-labeled with (C) NRB-AF12 or (D) ER-Tr green. Insets show magnification of the pictures. Magnification 60x; scale bar 10 μm. (E,F) Pearson's coefficient showing co-localization rate of (E) NRB-AF12 or (F) ER-Tr green with either SURs isoforms (n ≥ 15).