Metabolism of lipidoses (a) Impact of lipid trafficking in Niemann-Pick type C disease. (b) Impact of lipid metabolism in other lysosomal storage disorders. Abbreviations: ACAT, Cholesterol acyltransferase; CE, Cholesterol Ester; FC, Free Cholesterol; Hex, Hexadecanal; PE, Phosphatidylethanolamine; S1P, Sphingosine-1-Phosphate; Sph, Sphingosine; SphK1, Sphingosine Kinase; Sphingosine-1-Phosphate-Lyase; GlcCer, Glucosylceramide; NeuAc; N-acetyl nueraminc acid, GalCer, Galactosylceramide; Gal-GlcCer, Lactosylceramide; GalNAcβ3GalαGalβ4GlcCer, Globoside; GalαGalβ4GlcCer, Isoglobotriosylceramide.