Abstract
The distribution of sites capable of binding mouse satellite-complementary RNA in the cytological hybridization reaction has been examined in mouse liver and testis interphase nuclei. The approach taken has been to combine hybridization with semi-thin sectioning and autoradiography in order to obtain a clear picture of the relationship of satellite DNA-containing structures to the rest of the interphase nucleus. In liver nuclei, hybridization occurs primarily with blocks of heterochromatin associated with the nuclear envelope. The most prominent of these, in terms both of size and intensity of hybridization, is the nucleolar stalk and the rest of the nucleolus-associated heterochromatin. The nucleolar body itself is not labeled, nor is much of the peripheral condensed chromatin ; in fact, a polarized distribution of satellite DNA is evident. In Sertoli and spematid nuclei, satellite DNA is found in a small number of large heterochromatin blocks with which the nucleolus is associated; some of this material bears a relationship to the nuclear envelope in these cells also.
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Rae, P.M.M., Franke, W.W. The interphase distribution of satellite DNA-containing heterochromatin in mouse nuclei. Chromosoma 39, 443–456 (1972). https://doi.org/10.1007/BF00326177
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DOI: https://doi.org/10.1007/BF00326177