báo cáo khoa học: " Dynamic distribution patterns of ribosomal DNA and chromosomal evolution in Paphiopedilum, a lady’s slipper orchid" doc

... 11:126 http://www.biomedcentral.com/1471-2229/11/126 Page 7 of 15 RESEARCH ARTIC LE Open Access Dynamic distribution patterns of ribosomal DNA and chromosomal evolution in Paphiopedilum, a lady’s slipper orchid Tianying Lan and Victor A Albert * Abstract Background: ... contributions TL and VAA conceived of the study, TL performed all experiments, TL and...

Ngày tải lên: 11/08/2014, 11:21

... functional domains, to deter- mine the pattern of covalent attachment of substrates and intermediates to active sites during catalysis. Using the natural substrates, the acyltransferase and acylcarrier ... [24]. In this working model of the DKS, the AT and KR domains form a ‘collar’ surrounding the backwards and forwards path of travel of the two ACP domains, as they int...

Ngày tải lên: 16/03/2014, 03:20

... 10115, USA {habash,rambow}@cs.columbia.edu Abstract We present an approach to using a mor- phological analyzer for tokenizing and morphologically tagging (including part- of- speech tagging) Arabic ... Intelligence. AAAI. Kareem Darwish. 2003. Building a shallow Arabic mor- phological analyser in one day. In ACL02 Workshop on Computational Approaches to Semitic Languages, Philadelp...

Ngày tải lên: 20/02/2014, 15:20

... authentic clinical value for efficient therapies against animals, and human infectious diseases caused by pathogenic fungi. In particular, nystatin A1 , amphotericin B, and pimaricin (natamycin) are the ... solution structures of five representative glycosylated members, three tetraenes (pimaricin, nystatin A1 and rimocidin) and two heptaenes (candidin and vacidin A) have been...

Ngày tải lên: 21/02/2014, 03:20

... Academia Espa ˜ nola. 2001. Diccionario de la lengua espa ˜ nola. Espasa-Calpe, Madrid, 22 edi- tion. Real Academia Espa ˜ nola. 2009. Nueva gram ´ atica de la lengua espa ˜ nola. Espasa-Calpe, ... Elliphant using the training data randomly ordered. The performance reaches its plateau using 90% of the training instances. Using different ordering of the training set we obtain the same resu...

Ngày tải lên: 31/03/2014, 21:20

... intensity of evaporation, highly variable δ 18 O of rainwater, and water transfers in the soil via lateral drainage and water infiltration, might have contributed to the within profile variability. The ... Bariac et al. [3] observed a similar enrichment from –0.3 to –1.0 m in the wet season in a natural rainforest of French Guiana. The combination of seasonal variations...

Ngày tải lên: 08/08/2014, 14:22

... The approximate location and extent of ribosomal protein S1 has been indicated by a transparent green area and is based on [67]. The three tRNA-binding sites, A (aminoacyl), P (peptidyl) and ... structure and immediately suggested several important new RNA folds and rationales of RNA tertiary and quater- nary structure that had not hitherto been appreciated [5,7,8]. A...

Ngày tải lên: 19/02/2014, 17:20

... primers 5¢-CATATGCAACAGACAACCCAAATTCAGCCC-3¢ and 5¢-AGATCTTATCACTCCCTTACTAAGTCGATG-3¢ for the b subunit and 5¢-CATATGAGCGAGAAAACCA TGCGCGTGCAG-3¢ and 5¢-AGATCTTAGCTTCCTTT ACGCAGCTTATGC-3¢ for the c ... exists in a five-coordinated, square-pyramidal com- plex, suggesting again that the bound cobalamin is actually cob(II)alamin. Substrate- and K + -binding sites Substrate propane-1,2...

Ngày tải lên: 21/02/2014, 03:20

... Tyr-phosphorylated docking proteins recruit SH2-domain-containing sig- naling components to initiate specific signal cascades, and they coordinate and regulate Tyr kinase signaling events, and also display dynamic ... binding a given enzyme partner and a scaffold that has an enzy- matic domain of the same type. An additional complicating factor is that there are many other sign...

Ngày tải lên: 06/03/2014, 22:21

... 21; and Fig. 6B, lanes 30 and 33), indicating that both Hat1 and Hat2 are necessary for histone H4 binding. In contrast, both Hat1 and Hat2 were still able to copre- cipitate H4K12ac in the absence ... identification of a number of transcriptional regulators as histone acetyltransferases (HATs) and histone deacetylases. Acetylation in uences transcription by facilitating t...

Ngày tải lên: 07/03/2014, 05:20