Fig. 4From: Lipid changes within the epidermis of living skin equivalents observed across a time-course by MALDI-MS imaging and profilingMALDI-IMS-MSI images mapping the protonated and sodiated ions for ceramides and PC species across skin equivalent tissue sections representing the three time-stages within the time-course study (4, 6 or 24 h incubation period [from left to right]) and across lipid standards. Images are at a spatial resolution of 50 μm × 50 μm and are normalised against the total ion countBack to article page