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- W2947939705 abstract "Abstract The Japanese mantis shrimp Oratosquilla oratoria (Stomatopoda; Crustacea) is one of the most economically important aquatic species of Pacific shrimp and it is distributed from Japan to the coast of China, the Philippines, the Malay Peninsula, and the Hawaiian Islands. Early studies described certain characteristics of spermatogenesis and the sperm ultrastructure in Stomatopoda, but the composition of sperm basic nuclear proteins (SBNPs) remains completely unknown. We studied the sperm ultrastructure of O. oratoria using transmission electron microscopy and the histone composition using immunofluorescence and immunoelectron microscopy. We found that the spherical nucleus is adjacent to the electron translucent external coat, which occurs in early spermatids. The acrosomal structure begins to form at the junction of the nucleus and the external coat. At the mid‐spermatid stage, part of the chromatin appears to be more electron‐dense than the external coat side. The aflagellate sperm of O. oratoria , are rounded or slightly ovoid in shape and have a consistent granular nucleus, an acrosome structure of pushpin shape and a spherical vesicular body in which faintly granular material is scattered. The acrosome consists of an acrosomal vesicle, perforatorium, and subacrosomal material. The sperm contains histones H2A, H2B, H3, H4, H3.3, H2AX, and H2AZ as well as some histone modifications, that is, H3K9me3, H3K4me2, H3S10ph, H4Kac, and H2A + H4S1ph. Histones are localized not only in the nucleus of the sperm but also in other structures outside the nucleus. The results may provide new perspectives for systematic studies of crustaceans and their sperm chromatin components. These findings extend the study of the sperm structure of Stomatopoda and provide basic data to elucidate the epigenetic mechanism of fertilization." @default.
- W2947939705 created "2019-06-07" @default.
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- W2947939705 date "2019-05-29" @default.
- W2947939705 modified "2023-10-16" @default.
- W2947939705 title "Ultrastructure of spermiogenesis and the distribution of spermatozoal nuclear histones in the Japanese mantis shrimp, <i>Oratosquilla oratoria</i> (Crustacea: Stomatopoda)" @default.
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- W2947939705 doi "https://doi.org/10.1002/jmor.21008" @default.
- W2947939705 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6771690" @default.
- W2947939705 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31141207" @default.
- W2947939705 hasPublicationYear "2019" @default.
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