Figure 2.

Types of lipids that are suggested to be regulated by SUMOylation: Collection and classification of lipids based on textbook literature [19]. The red frames label lipids that are suggested to be regulated by SUMOylation. These include, for example, ergosterol in yeasts [24,25,26]; isoprenoids in C. elegans [27]; and, in mammals, cholesterol [28], bile acids [29,30], and free fatty acids [31,32]. Lipids are grouped by their biological functions and not by their chemical properties. Cholesterol has both structural and nonstructural roles; thus, it appears in two different categories. * Vitamin D is a byproduct of cholesterol, but it is grouped with other vitamins based on its biological function.