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(A) Tankwa goat sperm showing intact acrosomes (green fluorescence—FITC-PNA) and two sperm without acrosomes (white arrows). (B–E) Examples of mitochondrial membrane potential assessment, with midpieces fluorescing red and Hoechst staining in blue for nucleus. (B) Human sperm, (C) Chacma baboon, (D) Vervet monkey, (E) Rhesus monkey, from Maree [64].
