Fig. 2. Subcellular localization of CD36 in adult testis. Post-embedding immunoelectron microscopy. Ultrathin section were labelled with anti-CD36 antibody. (A) Adluminal part of the seminiferous epithelium of an adult mouse (left; bar, 160 nm); es, elongated spermatid; rs, round spermatid. White rectangle is enlarged in right panel (bar, 430 nm). Transversal section of the flagellum (star) in the middle of the electron dense region of the future residual body indicates the position of the elongated spermatid cytoplasm. The cytoplasmic part of the elongated spermatid, corresponding to residual bodies, is specifically labelled by the antibodies (arrowhead). (B) Basal part of the seminiferous epithelium of an adult mouse (left, bar, 235 nm). White rectangle is enlarged in right panel (bar, 400 nm). Some vesicles are specifically labelled by the antibodies (arrowhead).