Multivesicular bodies and the class E compartment. Genotypes are identified at left. Panels A, D, and G show tomographic sections, and the remaining panels show three-dimensional reconstructions. Panels A, B, C, show normal yeast multivesicular bodies; D, E, F show the class E compartment; and G, H, I show multivesicular bodies under conditions of defective cargo deubiquitination. Reproduced from the Journal of Cell Biology, 2006, 175: 715−720 [18]. Copyright 2006, Rockefeller University Press.