| 1. |
- Price, Alkes L., et al.
(författare)
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Discerning the ancestry of European Americans in genetic association studies
- 2008
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Ingår i: PLoS Genetics. - : Public Library of Science (PLoS). - 1553-7404. ; 4:1
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Tidskriftsartikel (refereegranskat)abstract
- European Americans are often treated as a homogeneous group, but in fact form a structured population due to historical immigration of diverse source populations. Discerning the ancestry of European Americans genotyped in association studies is important in order to prevent false-positive or false-negative associations due to population stratification and to identify genetic variants whose contribution to disease risk differs across European ancestries. Here, we investigate empirical patterns of population structure in European Americans, analyzing 4,198 samples from four genome-wide association studies to show that components roughly corresponding to northwest European, southeast European, and Ashkenazi Jewish ancestry are the main sources of European American population structure. Building on this insight, we constructed a panel of 300 validated markers that are highly informative for distinguishing these ancestries. We demonstrate that this panel of markers can be used to correct for stratification in association studies that do not generate dense genotype data.
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| 2. |
- Vonau, F, et al.
(författare)
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Branched Substituents Generate Improved Supramolecular Ordering in Physisorbed Molecular Assemblies
- 2009
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Ingår i: JOURNAL OF PHYSICAL CHEMISTRY C. - : American Chemical Society (ACS). - 1932-7447 .- 1932-7455. ; 113:12, s. 4955-4959
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Tidskriftsartikel (refereegranskat)abstract
- We present an experimental study supported by molecular simulations of the influence of the shape of alkyl side groups on the interactions and self-organization of supramolecular assemblies, built from bis-ureasubstituted toluene molecules deposited on Au(111) surfaces. In particular, we demonstrate the crucial importance of the presence of branched alkyl groups (i.e., ethylhexyl) that allow two adjacent supramolecular polymers to arrange closer to each other, leading to the formation of molecular "zippers". Thus, steric constraints at the level of individual molecules can generate improved Ordering between neighboring supramolecular polymers interacting with a planar substrate.
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| 3. |
- Isare, B., et al.
(författare)
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Engineering the cavity of self-assembled dynamic nanotubes
- 2009
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Ingår i: Journal of Physical Chemistry B. - : American Chemical Society (ACS). - 1520-6106 .- 1520-5207. ; 113:11, s. 3360-3364
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Tidskriftsartikel (refereegranskat)abstract
- By analogy with hydrogen-bonded molecular capsules, self-assembled nanotubes are of interest because they can temporarily isolate guest molecules from the solution. We show here that the stability of a particular bis-urea based dynamic self-assembled nanotube is related to the possibility for solvent molecules to fit inside the tubular cavity. The diameter of the cavity can be finely tuned by introducing a modified monomer in controlled amount.
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