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- W1985652189 abstract "Actin has been characterized and localized in sperm cells of many mammals. Nevertheless, the reported localizations obtained by different methods and/or antibodies varied from species to species and even for the same species. To clarify the question, sperm actin distribution was reinvestigated under uniform technical conditions. Immunogold post-embedding procedures were performed using a polyclonal and two monoclonal antibodies of known specificity to localize actin in spermatids and spermatozoa of rabbit, mouse, rat, monkey, and human. In these species, actin (F-actin) was detected with the three antibodies between the nucleus and the acrosome of round and elongating spermatids. Species-specific changes occurred in maturing spermatids. In the rabbit, actin labeling decreased and disappeared from the tip to the base of the subacrosomal layer. In testicular and epididymal spermatozoa actin was detected only with a monoclonal antibody (Amersham) successively in the neck, postacrosomal area, and subacrosomal bulges. In mouse late spermatids a transitory labeling of the neck was detected only with the polyclonal antiactin. In testicular and epididymal spermatozoa an actin labeling was observed in the principal piece of the tail. In rat, monkey, and human sperm cells actin remained undetected. These results suggest that there is a redistribution of actin in late spermatids and spermatozoa which is a species-specific process but not an artifact of methodological origin. Thus, a function for actin in sperm, if any, remains to be demonstrated." @default.
- W1985652189 created "2016-06-24" @default.
- W1985652189 creator A5084245701 @default.
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- W1985652189 date "1992-02-01" @default.
- W1985652189 modified "2023-09-25" @default.
- W1985652189 title "Species-specific localization of actin in mammalian spermatozoa: Factor artifact?" @default.
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- W1985652189 doi "https://doi.org/10.1002/jemt.1070200304" @default.
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