ChemInform Abstract: Structural Effect of gem-6 Substitution on C, N, P, S, and O Atoms: Crystallographic Data Analysis of Numerous C3CZCC3 Fragments. Modelization of Static and Dynamic Molecular States

ChemInform ◽  
1988 ◽  
Vol 19 (23) ◽  
Author(s):  
J. E. DUBOIS ◽  
A. COSSE-BARBI
Keyword(s):  
Data Analysis ◽  
Structural Effect ◽  
Crystallographic Data

VEDA: VERA data analysis software for VLBI phase-referencing astrometry

2020 ◽  
Vol 72 (4) ◽  
Author(s):  
Takumi Nagayama ◽  
Tomoya Hirota ◽  
Mareki Honma ◽  
Tomoharu Kurayama ◽  
Yuuki Adachi ◽  
...  
Keyword(s):  
Data Analysis ◽  
High Precision ◽  
Very Long Baseline Interferometry ◽  
Phase Fluctuation ◽  
Structural Effect ◽  
Analysis Software ◽  
Long Baseline ◽  
Vlbi Data ◽  
Motion Measurements ◽  
Maser Sources

Abstract We present the VEra Data Analyzer (VEDA) software package for Very Long Baseline Interferometry (VLBI) phase-referencing observations and parallax measurements. The Japanese VLBI project VLBI Exploration of Radio Astrometry (VERA) provides high-precision astrometric results at the 10 μas level. To achieve this precision, accurate calibration of the atmospheric phase fluctuation, the instrumental phase, and the source structural effect is required. VEDA specializes in phase-referencing data analysis, including these calibrations. In order to demonstrate its performance we analyzed H2O maser observations of W 3(OH) and Orion KL with VERA. Their parallaxes were obtained to be 0.527 ± 0.016 mas and 2.459 ± 0.029 mas, respectively. We also analyzed their data using AIPS, which is widely used for VLBI data analysis, and confirmed that the parallaxes obtained using VEDA and AIPS are coincident within 10 μas. VEDA is available for high-precision parallax and proper motion measurements of Galactic maser sources.

2Ch–2N square and hexagon interactions: a combined crystallographic data analysis and computational study

2019 ◽  
Vol 21 (38) ◽  
pp. 21568-21576 ◽  
Author(s):  
Yunxiang Lu ◽  
Wenxia Li ◽  
Weiwei Yang ◽  
Zhengdan Zhu ◽  
Zhijian Xu ◽  
...  
Keyword(s):  
Data Analysis ◽  
Computational Study ◽  
Crystallographic Data ◽  
Computational Approaches

2Ch–2N square and hexagon interactions were extensively investigated by the combination of crystallographic data analysis and computational approaches.

scholarly journals PBLR: an accurate single cell RNA-seq data imputation tool considering cell heterogeneity and prior expression level of dropouts

2018 ◽  
Author(s):  
Lihua Zhang ◽  
Shihua Zhang
Keyword(s):  
Data Analysis ◽  
Single Cell ◽  
Expression Patterns ◽  
Dropout Rate ◽  
Structural Effect ◽  
Cell Heterogeneity ◽  
Novel Method ◽  
Cell Subpopulations ◽  
Low Dimensional ◽  
Precise Expression

AbstractSingle-cell RNA sequencing (scRNA-seq) provides a powerful tool to determine precise expression patterns of tens of thousands of individual cells, decipher cell heterogeneity and cell subpopulations and so on. However, scRNA-seq data analysis remains challenging due to various technical noise, e.g., the presence of dropout events (i.e., excess zero counts). Taking account of cell heterogeneity and structural effect of expression on dropout rate, we propose a novel method named PBLR to accurately impute the dropouts of scRNA-seq data. PBLR is an effective tool to recover dropout events on both simulated and real scRNA-seq datasets, and can dramatically improve low-dimensional representation and recovery of gene-gene relationship masked by dropout events compared to several state-of-the-art methods. Moreover, PBLR also detect accurate and robust cell subpopulations automatically, shedding light its flexibility and generality for scRNA-seq data analysis.

scholarly journals Expression, crystallization and preliminary crystallographic data analysis of PigI, a putativeL-prolyl-AMP ligase from the prodigiosin synthetic pathway inSerratia

2014 ◽  
Vol 70 (5) ◽  
pp. 624-627 ◽  
Author(s):  
Ning Han ◽  
Tingting Ran ◽  
Xiangdi Lou ◽  
Yanyan Gao ◽  
Jianhua He ◽  
...  
Keyword(s):  
Data Analysis ◽  
Catalytic Mechanism ◽  
Unit Cell ◽  
Crystallographic Data ◽  
Biosynthesis Pathway ◽  
Red Pigment ◽  
Asymmetric Unit ◽  
Unit Cell Parameters ◽  
Solvent Content ◽  
Cell Parameters

Prodigiosin, a member of the prodiginines, is a tripyrrole red pigment synthesized bySerratiaand some other microbes. A bifurcated biosynthesis pathway of prodigiosin has been proposed inSerratiain which MBC (4-methoxy-2,2′-bipyrrole-5-carbaldehyde) and MAP (2-methyl-3-N-amyl-pyrrole) are synthesized separately and then condensed by PigC to form prodigiosin. The first step for the synthesis of MBC is the activation of L-proline by PigI, but its catalytic mechanism has remained elusive. To elucidate its mechanism, recombinant PigI was purified and crystallized. Crystals obtained by the sitting-drop method belonged to space groupP1 and diffracted to 2.0 Å resolution, with unit-cell parametersa= 51.2,b= 62.8,c= 91.3 Å, α = 105.1, β = 90.1, γ = 92.2°. Matthews coefficient analysis suggested two molecules in the asymmetric unit, with aVMof 2.6 Å3 Da−1and a solvent content of 52.69%.

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