Figure 2From: Spermatozoal sensitive biomarkers to defective protaminosis and fragmented DNATUNEL assay. TUNEL-positive nuclei (with double-strand nuclear DNA fragmentation) of spermatozoa as represented by the intense (A) and dull (B) Texas red fluorescence in the nuclear region. The healthy nuclei (without DNA fragmentation) are stained blue with DAPI (C) used as counterstain.Back to article page