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RNAi factors and their catalytic activities are essential for heterochromatin assembly in S. pombe. This has led to the idea that siRNAs can promote H3K9 methylation by recruiting the cryptic loci regulator complex (CLRC), also known as recombination in K complex (RIKC), to the nucleation site. The conserved RNA-binding protein Rct1 (AtCyp59/SIG-7) interacts with splicing factors and RNA polymerase...
In many plants, including Arabidopsis, hybrids between species and subspecies encounter postfertilization barriers in which hybrid seed fail to develop, or else give rise to infertile progeny. In Arabidopsis, some of these barriers are sensitive to ploidy and to the epigenetic status of donor and recipient genomes. Recently, a role has been proposed for heterochromatin in reprogramming events that...
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