What are the antigens to which the Anti mouse IgG FITC Conjugate Antibodies binds in the seminiferous tubule of testis?

When I experimented it with Goat testis via Immunohistochemistry, the fluorescence appears one binding to outer fibroblast layer of each tubule. Please suggest Antibodies are binding to which antigen.

07 July 2014 9,432 3 View