Báo cáo khoa học: Well-defined secondary structures Information-storing molecular duplexes and helical foldamers based on unnatural peptide backbones pot

... 2004 Well-defined secondary structures of unnatural oligomers (Eur. J. Biochem. 271) 1425 REVIEW ARTICLE Well-defined secondary structures Information-storing molecular duplexes and helical foldamers ... observed association constants. In addition, one must consider that in heterocycle -based modules, secondary electrostatic interactions, due to the proximity of adj...

Ngày tải lên: 23/03/2014, 12:20

... segmentation and can be utilized for video summarization. Inspired by Barzilay’s work, we employ HMMs for topic identification, wherein a state corre- sponds to a topic, like preparation and frying, and various ... For example, frying and boiling are usually performed on a gas range and preparation and dishing up are usually performed on a cutting board. This infor- mation can...

Ngày tải lên: 31/03/2014, 01:20

... that the unconventional 99-loop and 220-loop conformations of HGFA are part of an ensemble of conformational states, and that the substrate is simply sampling the conventional conformation, in effect ... (standard) active site conformation The determined HGFA structures reveal three different conformational states of the active site region: a cata- lytically competent (standard) conform...

Ngày tải lên: 15/03/2014, 11:20

... Myoglobin and Their Reactions with Ligands. Elsevier, North-Holland Publishing, Amsterdam, the Netherlands. 2. Dickerson, R.E. & Geis, I. (1983) Hemoglobin: Structure, Func- tion, Evolution and ... illustrating the E- and F-helix N i –N i+1 connections (solid lines and arrows), the F-helix a i – N i+1 connections (dashed lines), and the dipolar contacts between Tyr32(B10), Tyr66...

Ngày tải lên: 23/03/2014, 17:22

... analyzed by SDS- PAGE under nonreducing conditions, and a band slightly larger than the wild-type toxin and an addi- tional smear were observed (Fig. 1A). This larger band and smear shifted to the ... substitutions, loop regions were produced as synthetic peptides and their binding abilities were inves- tigated. Synthetic peptides corresponding to loops 2 and 3 inhibited the interac...

Ngày tải lên: 29/03/2014, 22:21

... besides, conditioning the external collection on the query is very beneficial, and making can- didate expansion terms dependent on just the document seems sufficient. 1 Introduction One of the grand ... expand the query using global collection statistics based, for instance, on a co-occurrence analysis of the en- tire collection. Thesaurus- and dictionary -based expansion as, e.g.,...

Ngày tải lên: 30/03/2014, 23:20

... Mouton, 1974, pp.106-128. DiJk, T.A. van: Text and Context: Explorations in the Semantics and PTagmatics of Discourse. London, New York: Longman, (1977) 1980 (a). DiJk, T.A. van: Macrostructures: ... readings from computation procedures based exclusively on configuration data from the frame knowledge base (HAHN/REIMER 1984). One common type of coherence relations is accoun...

Ngày tải lên: 31/03/2014, 17:20

... ) and 3. ( ) and 4. ( ) and 5. ( ) and 6. ( ) and 7. ( ) and 8. ( ) and 9. ( ) and Category 1 features depend only on the source word and the target word . A ME model that uses only those, predicts ... word and repre- sents a specific source word. Category if and only if 1 2 and 2 and 3 and 3 and 6 and 7 and for the word pair , we use the following categori...

Ngày tải lên: 20/02/2014, 18:20

... lelism constraints and their equality up-to con- straints have been shown to be (non-trivially) intertranslatable (Niehren and Koller, 1998) if binding and linking relations in A -structures ... parallel structures the the two exception positions: v{=Vl.~ro A v~=v2.~ro 2. the two contexts, which are the trees be- low Vl and v2 up-to the trees below the ex- ception posi...

Ngày tải lên: 20/02/2014, 18:20

... than both Sl and $2. Such an mgu exists if and only if $1 and $2 are con- sistent; that is, if and only if they subsume a common feature structure. 1.2 Unification algorithms and this paper ... description and verification of our algorithm. A full report on this work will be available in the near fu- ture. 2. UNIFICATION IN THE PRESENCE OF CONSTRAINTS 2.1 Constraints...

Ngày tải lên: 22/02/2014, 10:20