Subcellular distribution of survivin protein in primary human chondrocytes. (A-F) Immunofluorescence for survivin in primary chondrocytes cultured on glass slides (red). Staining with 4,6-diamidino-2-phenylindole (blue) of the identical positions is also shown. Survivin is located at the equatorial plate at metaphase in a mitotic cell (C, D). A midbody in a dividing cell with strong positive staining for survivin is shown (E, F).