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3D images of ER-PM contacts. a–j Representative serial images from FIB/SEM are showing the ER just beneath the PM. a′–j′ The region of the ER (red) just attached along the PM (blue) is segmented for the reconstruction of the ER-PM contacts. k Showing a representative ER-PM contacts (arrows) is shown in 3D. Their shapes and sizes varied. Scale bar a–c 1 µm
