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Hoechst 33258 and chlortetracycline (CTC) staining patterns. a Hoechst‐stained dead sperm, blue colored over the whole head. b F Pattern (non‐capacitated), uniform fluorescence on the head. c B pattern (capacitated), a fluorescence free band on the post acrosomal region. d AR pattern (acrosome reacted), a uniformly fluorescence‐free head
