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In the nuclei of eukaryotic cells, euchromatin is located at the center, whereas heterochromatin is found at the periphery and is interspersed in the nucleoplasm. Solovei et al. (2009) now reveal that this normal pattern is reversed in the retinal rod cells of mice. This inversion might serve to maximize light transmission to photoreceptors in nocturnal mammals.
In a screen for binding partners of the Epstein–Barr virus transformation-related protein EBNA2, we cloned a novel, evolutionarily conserved protein showing similarity to the Drosophila Parallel Sister Chromatids Protein (PASC). We have named this protein “Friend of EBNA2” (FOE). Human FOE encodes a protein of 1227 amino acids with a functional bipartite nuclear localization signal, an arginine-rich...
Recent studies of nuclear organization have shown an apparent correlation between the localization of genes within the interphase nucleus and their transcriptional status. In several instances, actively transcribed gene loci have been found significantly looped away from their respective chromosome territories (CTs), presumably as a result of their expression. Here, we show evidence that extrusion...
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