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Andreae, M. O.,Acevedo, O. C.,Araù,jo, A.,Artaxo, P.,Barbosa, C. G. G.,Barbosa, H. M. J.,Brito, J.,Carbone, S.,Chi, X.,Cintra, B. B. L.,da Silva, N. F.,Dias, N. L.,Dias-Jú,nior, C. Q.,Dita Copernicus GmbH 2015 Atmospheric Chemistry and Physics Vol.15 No.18
<P>Abstract. The Amazon Basin plays key roles in the carbon and water cycles, climate change, atmospheric chemistry, and biodiversity. It has already been changed significantly by human activities, and more pervasive change is expected to occur in the coming decades. It is therefore essential to establish long-term measurement sites that provide a baseline record of present-day climatic, biogeochemical, and atmospheric conditions and that will be operated over coming decades to monitor change in the Amazon region, as human perturbations increase in the future. The Amazon Tall Tower Observatory (ATTO) has been set up in a pristine rain forest region in the central Amazon Basin, about 150 km northeast of the city of Manaus. Two 80 m towers have been operated at the site since 2012, and a 325 m tower is nearing completion in mid-2015. An ecological survey including a biodiversity assessment has been conducted in the forest region surrounding the site. Measurements of micrometeorological and atmospheric chemical variables were initiated in 2012, and their range has continued to broaden over the last few years. The meteorological and micrometeorological measurements include temperature and wind profiles, precipitation, water and energy fluxes, turbulence components, soil temperature profiles and soil heat fluxes, radiation fluxes, and visibility. A tree has been instrumented to measure stem profiles of temperature, light intensity, and water content in cryptogamic covers. The trace gas measurements comprise continuous monitoring of carbon dioxide, carbon monoxide, methane, and ozone at five to eight different heights, complemented by a variety of additional species measured during intensive campaigns (e.g., VOC, NO, NO2, and OH reactivity). Aerosol optical, microphysical, and chemical measurements are being made above the canopy as well as in the canopy space. They include aerosol light scattering and absorption, fluorescence, number and volume size distributions, chemical composition, cloud condensation nuclei (CCN) concentrations, and hygroscopicity. In this paper, we discuss the scientific context of the ATTO observatory and present an overview of results from ecological, meteorological, and chemical pilot studies at the ATTO site. </P>
Blind prediction of homo‐ and hetero‐protein complexes: The CASP13‐CAPRI experiment
Lensink, Marc F.,Brysbaert, Guillaume,Nadzirin, Nurul,Velankar, Sameer,Chaleil, Raphaë,l A. G.,Gerguri, Tereza,Bates, Paul A.,Laine, Elodie,Carbone, Alessandra,Grudinin, Sergei,Kong, Ren,Liu, Ran& John WileySons, Inc. 2019 Proteins Vol.87 No.12
<P><B>Abstract</B></P><P>We present the results for CAPRI Round 46, the third joint CASP‐CAPRI protein assembly prediction challenge. The Round comprised a total of 20 targets including 14 homo‐oligomers and 6 heterocomplexes. Eight of the homo‐oligomer targets and one heterodimer comprised proteins that could be readily modeled using templates from the Protein Data Bank, often available for the full assembly. The remaining 11 targets comprised 5 homodimers, 3 heterodimers, and two higher‐order assemblies. These were more difficult to model, as their prediction mainly involved “ab‐initio” docking of subunit models derived from distantly related templates. A total of ~30 CAPRI groups, including 9 automatic servers, submitted on average ~2000 models per target. About 17 groups participated in the CAPRI scoring rounds, offered for most targets, submitting ~170 models per target. The prediction performance, measured by the fraction of models of acceptable quality or higher submitted across all predictors groups, was very good to excellent for the nine easy targets. Poorer performance was achieved by predictors for the 11 difficult targets, with medium and high quality models submitted for only 3 of these targets. A similar performance “gap” was displayed by scorer groups, highlighting yet again the unmet challenge of modeling the conformational changes of the protein components that occur upon binding or that must be accounted for in template‐based modeling. Our analysis also indicates that residues in binding interfaces were less well predicted in this set of targets than in previous Rounds, providing useful insights for directions of future improvements.</P>
대장균에서 발현된 효모 Tryptophan Synthetase 의 생화학 및 면역학적 성질에 대한 연구
유향숙,John A . Carbon ( Hyang Sook Yoo,John A . Carbon ) 생화학분자생물학회 1991 BMB Reports Vol.24 No.2
The yeast tryptophan synthetase gene (TRP5) cloned in E. coli is functionally expressed and can complement trpAB deletion mutation in E. coli. We have partially purified the tryptophan synthetase from the yeast, Saccharomyces cerevisiae and trpAB, deleted E. coli containing the yeast recombinant plasmid pYe(trp5)2-11 and examined their biochemical and immunological characteristics. Sephadex G-200 gel filtration of the partially purified enzymes show that the molecular weight of the enzyme produced in E. coli by the pYe(trp5)2-11 is nearly the same (160,000) as that of authentic yeast tryptophan synthetase (155,000). SDS-acrylamide gel analysis of the proteins produced from the E. coli minicells containing yeast TRP5 recombinant plasmid show that the subunit size of yeast tryptophan synthetase produced in E. coli is 72,500, approximately same as the subunit from the native yeast enzyme. Antibody raised against partially purified yeast tryptophan synthetase inactivates the enzyme activity produced in trpAB deleted E. coli by the yeast recombinant plasmids pYe(trp 5). This indicates that tryptophan synthetase produced from the yeast TRP5 gene cloned in E. coli is very similar or identical to the native yeast tryptophan synthetase in its biochemical and immunological characteristics and is different from E. coli tryptophan synthetase. This suggests that large mRNAs must be synthesized from the eucaryotic DNA by the E. coli RNA polymerase and the yeast translational signals are recognized by the E. coli ribosomes, initiation and termination components.
Ultrafast electron energy-loss spectroscopy in transmission electron microscopy
Pomarico, Enrico,Kim, Ye-Jin,Garcí,a de Abajo, F. Javier,Kwon, Oh-Hoon,Carbone, Fabrizio,van der Veen, Renske M. Cambridge University Press (Materials Research Soc 2018 MRS bulletin Vol.43 No.7
<▼1><B>Abstract</B><P/></▼1><▼2><P>In the quest for dynamic multimodal probing of a material’s structure and functionality, it is critical to be able to quantify the chemical state on the atomic-/nanoscale using element-specific electronic and structurally sensitive tools such as electron energy-loss spectroscopy (EELS). Ultrafast EELS, with combined energy, time, and spatial resolution in a transmission electron microscope, has recently enabled transformative studies of photoexcited nanostructure evolution and mapping of evanescent electromagnetic fields. This article aims to describe state-of-the-art experimental techniques in this emerging field and its major uses and future applications.</P></▼2>
Optical and thermodynamic properties of the high-temperature superconductorHgBa2CuO4+δ
van Heumen, E.,Lortz, R.,Kuzmenko, A. B.,Carbone, F.,van der Marel, D.,Zhao, X.,Yu, G.,Cho, Y.,Barisic, N.,Greven, M.,Homes, C. C.,Dordevic, S. V. American Physical Society 2007 Physical review. B, Condensed matter and materials Vol.75 No.5