Summary
Sulfhydryl oxidase (SOx), an enzyme that catalyzes the oxidation of sulfhydryl compounds, appears in the spermatogenic cells of rat and hamster testes in a stage-dependent manner. It first appears in pachytene spermatocytes at stage I in both the animal species studied. SOx immunoreactivity is associated with mitochondria of these cells. The fate of such mitochondria is species-dependent. In rat, the immunoreactive mitochondria aggregate during maturation phase and are retained in the residual bodies. Spermatozoa free of SOx are released into the lumen. On the other hand, in hamster, the immunoreactive mitochondria arrange themselves around the midpiece of spermatozoa. In such a case, residual bodies lack SOx. The appearance of SOx coincides with the appearance of LDH-X in the spermatogenic cells. Like many other proteins such as LDH-X, RSA-1 and cytochrome ct, SOx provides yet another example of differential gene activation associated with a developmental process of gametes.
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Kumari, M., Aumüller, G., Bergmann, M. et al. Stage-dependent appearance of sulfhydryl oxidase during spermatogenesis in the testis of rat and hamster. Histochemistry 94, 365–371 (1990). https://doi.org/10.1007/BF00266442
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DOI: https://doi.org/10.1007/BF00266442