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Characterization of the pattern of SDF. (A) Photomicrograph of toluidine blue-stained equine sperm and clusters of broken down chromatin. (B-C) Electron micrographs of equine sperm with impaired condensation (B; asterisks) or premature decondensation of nuclear chromatin (C; arrow) showing broken down aggregates of chromatin (arrow heads). Scale bars = A: 10 µm; B-C: 1 µm.
