Co-localization of Hs-8 and anti-GAPDHS antigens in the human sperm cells. A. Hs-8 staining of the sperm cell. Indirect immunofluorescence of human spermatozoa with MoAb Hs-8 (green). B. Cellular localization of GAPDHS protein detected with anti-GAPDHS antibody (red). C. Merge. Yellow colour represents co-localization of the Hs-8 antigen with GAPDHS signal in the sperm head and tail. Bar: 10 μm.