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Figure 10


Fig. 10. TEM analysis of control and yuriF64 mutant sperm. (A) Individualized control sperm (Sp/CyO Roi) each have one axoneme (Ax), one major mitochondrial derivative (M), and one minor mitochondrial derivative (m), contained within a single plasma membrane. (B) yuriF64/CyO Roi cysts contain mixtures of individualized (upper half of image) and non-individualized (lower half) sperm. (C) No individualization is seen in yuriF64 homozygotes. Major mitochondrial derivatives look normal but minor derivatives are enlarged (arrows). (D,E) yuriF64 homozygotes and (F-I) heterozygotes showing that axonemes in elongating cysts are sometimes associated with aberrant sets of mitochondrial derivatives, often sharing them or possessing multiple derivatives of the same type. P, paracrystalline body in major mitochondrial derivative. The outer ring of microtubule doublets is sometimes broken (arrows), and internal components (central-pair microtubules or linker arms) can be missing (arrowheads). Axonemes of apparently opposing chirality (curved arrows of differing color) are visible in D-F, and the central microtubule pair is seen to be `escaping' the opened axoneme in I (arrow). Scale bars: 500 nm in A-G, 250 nm in H,I.





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