Jose A. Ferreira

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Coiled bodies are conserved subnuclear domains found in both plant and animal cells. They contain a subset of splicing snRNPs and several nucleolar antigens, including Nopp140 and fibrillarin. In addition, autoimmune patient sera have identified a coiled body specific protein, called p80 coilin. In this study we show that p80 coilin is ubiquitously(More)
Coiled bodies (CBs) are nuclear organelles in which splicing snRNPs concentrate. While CBs are sometimes observed in association with the nucleolar periphery, they are shown not to contain 5S or 28S rRNA or the U3 snoRNA. This argues against CBs playing a role in rRNA maturation or transport as previously suggested. We present evidence here that CBs are(More)
In the interphase nucleus of mammalian cells the U1, U2, U4/U6, and U5 small nuclear ribonucleoproteins (snRNPs), which are subunits of spliceosomes, associate with specific subnuclear domains including interchromatin granules and coiled bodies. Here, we analyze the association of splicing snRNPs with these structures during mitosis and reassembly of(More)
Murine erythroleukemia (MEL) cells are erythroid progenitors that can be induced to undergo terminal erythroid differentiation in culture. We have used MEL cells here as a model system to study the nuclear organization of splicing snRNPs during the physiological changes in gene expression which accompany differentiation. In uninduced MEL cells, snRNPs are(More)
BACKGROUND Determining a suitable sample size is an important step in the planning of microarray experiments. Increasing the number of arrays gives more statistical power, but adds to the total cost of the experiment. Several approaches for sample size determination have been developed for expression array studies, but so far none has been proposed for(More)
We congratulate Romano, Shaikh, and Wolf for their interesting work. Our only criticism to the presentation of the article, which is otherwise very readable, concerns Remark 1 on p. 8. This is crucial to understanding the method, because it explains that the estimates of the probabilities under the null are determined by the smaller test statistics, so it(More)
We are extremely appreciative of the insightful comments made by all the responders. The goal of constructing useful multiple testing methods which control the false discovery rate and other measures of error is currently a thriving and important area of research. On the one hand, the bootstrap method presented in the present work seems to work quite well(More)
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