Fig. 9. GAR22 immunohistochemistry of mouse testes. Testicular sections of (A) 3-week- or (B) 5-month old mice were stained with the C15 antibody and TRITC-labeled goat-anti-rabbit secondary antibody. The staining is localized predominantly in the cytoplasm of the germ cells and in the heads of the spermatozoa (indicated with arrows). The staining is likely to represent mGAR22ß since it is the only protein recognized by C15 antibody on western blots of mouse testes. Bar, 20 µm.