Representative live cells microphotographs showing co-localization between NRB-AF12 (left column) and ER-Tr red (mid column) in (A) HepG2, (B) HSC-T6, (C) HeLa, and (D) primary rat vascular smooth muscle cells (VSMC) from caudal artery. For each panel, merged fluorescence is shown in right column. Magnification 60x; scale bar, 10 μm. (E) Quantification of NRB-AF12 and ER-Tr co-localization is shown as Pearson's coefficient (n ≥ 15).