Báo cáo khoa học: From meiosis to postmeiotic events: Homologous recombination is obligatory but ﬂexible doc

... compilation ª 2009 FEBS 589MINIREVIEW From meiosis to postmeiotic events: Homologous recombination is obligatory but ﬂexible Lo´ra´nt Sze´kvo¨lgyi and Alain Nicolas Recombination and Genome Instability ... of histone amino acidsor histone-modifying enzymes. The replacement ofhistones during mammalian late spermatogenesis is reviewed by Gaucher et al. (this issue [111a]). Pertur-bation of histone ... con-trolled.Meiotic recombination is obligatory forfaithful meiosis The process of homologous recombination is intrinsic to the success of meiosis. After DNA replication andbefore chromosome segregation, homologous...

Báo cáo khoa học: From meiosis to postmeiotic events: Alignment and recognition of homologous chromosomes in meiosis ppt

... (2009) From meiosis to post-meiotic events: Homologous recombination is obliga-tory but ﬂexible. FEBS J 277, 571–589.2 Kagawa W & Kurumizaka H (2009) From meiosis to postmeiotic events: ... MINIREVIEW From meiosis to postmeiotic events: Alignment andrecognition of homologous chromosomes in meiosis Da-Qiao Ding1, Tokuko Haraguchi1,2,3and Yasushi Hiraoka1,2,31 ... replication is followed by two consecutivenuclear divisions to halve the number of chromosomes.A characteristic feature of meiosis is the behaviorexhibited by homologous chromosomes. Homologous chromosomes...

Báo cáo khoa học: From meiosis to postmeiotic events: The secrets of histone disappearance potx

... nucleosomesHyperacetylationHistonereplacementby basic proteins Histone variantsTPs - PrmsHistone proteolysisFig. 1. The secrets of histone disappearance in elongating spermatids. (A) Extensive incorporation of histone ... in histonedisplacement. In order to test this hypothesis, micelacking both TPs and Prms would be required. Indeed, to understand the basis of histone replacement, itwould be critical to know ... system. It is also important to deter-mine whether histone proteolysis concerns nucleosomalhistones or histones released after nucleosome disas-sembly. Further dedicated and speciﬁc research is needed...

Tài liệu Báo cáo khoa học: From heart to mind The urotensin II system and its evolving neurophysiological role ppt

... [2].This particular amino acid is absent in URP, but thepeptide is still a potent agonist at the UII receptorwith a pharmacological profile equal to that of UII[17,20]. Therefore, this residue is ... confined to certain motor nuclei of the centralnervous system (CNS). From the very beginning, thesefindings pointed to a possible neuromodulatory rolefor UII.The aim of this review is to provide ... thisresidue. It can be speculated that a receptor subtypeexists that is able to distinguish between UII and URPpeptides, but in mammalian genomes no homologous sequences can be found that would...

Báo cáo khoa học: "From Strings to Trees to Strings to Trees" potx

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Báo cáo khoa học: "From Chunks to Function-Argument Structure: A Similarity-Based Approach" doc

... strategy is to isolate the (finite-state) analysisof non-recursive syntactic structure, i.e. chunks, from larger, recursive structures. This resultsin a highly-efficient parsing architecture that is realized ... tree from the instance base needs to be modified to matchthe chunked input. This means that the outputtree will group together only those elements from the chunked input for which there is evidence ... since thePOS tagger cannot resolve this ambiguity from local context, the underspecified tag ’about’ is as-signed, instead. However, this can in turn lead to misclassification in the chunker.The...

Báo cáo khoa học: "From Single to Multi-document Summarization: A Prototype System and its Evaluation" pptx

... it is important to have common and agreed upon metrics to facilitate large scale evaluation efforts. 4.1.2 Precision and Pseudo Precision Precision is also a common measure. Borrowed from ... assign a score of 4 to all, 3 to most, 2 to some, 1 to hardly any, and 0 to none. The value assignment is for convenience of computing averages, since it is more appropriate to treat these measures ... 90292 {cyl,hovy}@isi.edu Abstract NeATS is a multi-document summarization system that attempts to extract relevant or interesting portions from a set of documents about some topic and present...

Báo cáo khoa học: "From Extractive to Abstractive Meeting Summaries: Can It Be Done by Sentence Compression?" pdf

... sentence frequency (ISF) for thesephrases using the entire ICSI meeting corpus. The ISFscore of a phrase i is: isfi=NNiwhere N is the total number of sentences and Ni is thenumber of sentences ... to avoid this rephrasingMarkov (S2): we have to reﬁne the tasks which we haven’tdone order to avoid this rephrasingFP + IP: we have to reﬁne the tasks more and more whichwe haven’t done to ... word wi is in the compressed sentence;xijk= 1 represents that the sequence wi, wj, wk is in the compressed sentence. A trade-off parameterλ is used to balance the contribution from the...

Báo cáo khoa học: "From Submit to Submitted via Submission: On Lexical Rules in Large-Scale Lexicon Acquisition" docx

... "agent-of" is attached to it. The mechanism of rule application is illustrated below. The form list generated by the morpho-semantic generator is checked against three MRDs (Collins Spanish-English, ... new LR is added, each lexical entry needs to be revisited and possibly updated. • Itule LIIS Constraints - The other approach is to maintain a bank of LRs, and rely on their LHSs to constrairi ... during large-scale semi-automatic compu- tational lexicon acquisition. The analy- sis is based on a set of LRs implemented and tested on the basis of Spanish and English business- and finance-related...

Báo cáo khoa học: "From RAGS to RICHES: exploiting the potential of a ﬂexible generation architecture" pot

... interact.This paper describes a concrete realisation ofthe RAGS object and arrows model, OASYS,as applied to a simple but ﬂexible NLG systemcalled RICHES. This is not the ﬁrst such re-alisation: ... translated to cue phrases to express somerhetorical relations explicitly. Initially the plan-ner creates a skeleton document representationthat is a one -to- one mapping of the rhetorical rep-resentation, ... type realised by re-lates structures at different levels of representa-tion. for example, indicating that this SemRepobject is realised by this SynRep object. Arrowtype revised to provides...

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