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Sperm centrioles are stable structures. (A) Super-resolution imaging (STED) of human spermatozoa stained for centrin and β-tubulin. Scale bar: 1 μm. (B) Human sperm immunofluorescence (IF) of acetylated tubulin and β-tubulin in the human sperm centrioles visualized with STED. Scale bar: 1 μm. H, head; M, midpiece; T, tail. N = 2 different sperm samples.
