Localization of MILI and MIWI2 in the MVH-deficient fetal germ cells. (A) Immunofluorescence staining of wild-type and mutant testes. Sections of E16.5 testes were stained with anti-MVH, anti-MILI, anti-TDRD1, anti-MIWI2, and anti-TDRD9 antibodies, control IgG. (B) Electron microscopic analyses of MVH-, MILI-, and MIWI2-deficient and control E17.5 testes. Arrowheads indicate intermitochondrial cement.