The compositional proportions of lipid classes in GrEVs versus GrEXs. Each mol% represents the proportion of each lipid class relative to the total lipid contents, which was defined as the sum of the amount of identified lipid species determined by measuring its peak area relative to that of the corresponding internal standard (n = 9 per group; three biological replicates, each with three technical replicates). Lipid classes that increased in GrEVs or GrEXs are indicated by light or dark gray colors, respectively.