Figure 9.

Analysis of gross differences in composition within an unlabeled cell. Endothelial cells were cultured on silicon supports, fixed on the support, dried, and analyzed with MIMS. Quantitative mass images of the surface of a whole endothelial cell were recorded in parallel at masses ¹²C^-, ¹²C¹⁴N^- and ³¹P^-. An overlay of these images is shown, with ¹²C¹⁴N in red, ¹²C in green, and ³¹P in blue. Scale bar = 10 μm.