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pubmed-article:8142029pubmed:abstractTextThe distribution of U1, U2, U4, U5 and U6 small nuclear ribonucleoproteins (snRNPs) and interchromatin granules (IGs) was studied by electron-microscopic immunocytochemistry (EMI) in early 2-cell mouse embryos at the onset of embryonal transcription. The localization of these antigen structures was evaluated with respect to nucleoplasmic ribonucleoprotein (RPN) regions consisting of interchromatin and perichromatin areas. SnRNP structures of maternal origin (labelled with anti-Sm antibody) were widely distributed throughout the nucleoplasm. Specifically labelled IGs were detected by gold particle clusters distributed in the interchromatin regions of the nucleoplasm. Both immunodetections were negative in nucleolar precursor bodies (NPBs). In addition, the labelling of condensed chromatin blocks with anti-DNA antibody showed heterochromatin topology at this developmental stage. Small condensed chromatin blocks were distributed throughout the nucleus and also appeared in association with the NPB rim. The observed status quo represents a transient state of nuclear structure rearrangement.lld:pubmed
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pubmed-article:8142029pubmed:dateRevised2008-11-21lld:pubmed
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pubmed-article:8142029pubmed:articleTitleImmunoelectron microscopic localization of small nuclear ribonucleoproteins and interchromatin granules in the 2-cell mouse embryo.lld:pubmed
pubmed-article:8142029pubmed:affiliationInstitute of Animal Physiology, Slovak Academy of Sciences, Kosice.lld:pubmed
pubmed-article:8142029pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:8142029pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed