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A–C. Cytochemical test of Thiéry (1967) in the spermatozoon of Atractotrema sigani. (A) Transmission electron micrographs showing the absence of granules of glycogen in region I. (B, C) Cross-sections exhibiting the presence of granules of glycogen in regions III–V of the mature spermatozoon of A. sigani. Cm, cortical microtubules; G, glycogen granules; M2, second mitochondrion; N, nucleus; Pse, posterior spermatozoon extremity. Scale in μm: (A–C), 0.3.
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