Keating Hester (minuteneed80)
It describes what the clinician might say and when, what recommendations to offer and how to frame them, and how to comport oneself while providing care. CONCLUSIONS Personality-informed care operationalizes several aspects of personalized medicine, and it offers a heuristic framework that may facilitate and enhance the implementation of evidence-based care. The Macromolecular Neutron Diffractometer known as MaNDi is located on beamline 11B of the Spallation Neutron Source at Oak Ridge National Laboratory. Neutrons are produced in discrete pulses at the Spallation Neutron Source, which enables Laue diffraction data through measuring the time-of-flight and thus wavelength of each diffracted neutron. The MaNDi diffractometer is optimized to collect diffraction data from protein crystals with unit cell axes between 30 and 300Å. The instrument is designed to provide flexibility in several instrumental parameters such as wavelength bandwidth and beam divergence to allow data collection from a range systems. Data collection is possible at room temperature or 100K using a standard nitrogen gas stream cooler combined with standard X-ray style mounting pins and loops. UT-Battelle, LLC, under Contract No. DE-AC05-00OR22725 with the U.S Department of Energy.IMAGINE is a high intensity, quasi-Laue neutron crystallography beamline developed at the 85MW High Flux Isotope Reactor (HFIR) at Oak Ridge National Laboratory (ORNL). This state-of-the-art facility for neutron-diffraction enables neutron protein structures to be determined at or near atomic resolutions from crystals with volumes of less then 1mm3 and unit cell edges of less then 150Å. The beamline features include elliptical focusing mirrors that deliver neutrons into a 2.0×3.2mm2 focal spot at the sample position, and variable short and long wavelength cutoff optics that provide automated exchange between multiple wavelength configurations. The beamline is equipped with a single-axis goniometer, neutron-sensitive cylindrical image plate detector and room temperature and cryogenic sample environments. This article describes the beamline components, the diffractometer and the data collection and data analysis protocols that are used, and outlines the protein deuteration, crystallization and conventional crystallography capabilities that are available to users at ORNL's neutron facilities. We also present examples of the scientific questions being addressed at this beamline and highlight important findings in enzyme chemistry that have been made possible by IMAGINE. © 2020 Elsevier Inc. All rights reserved.Adding hydrogen atoms and protonation states to structures of membrane proteins requires successful implementation of neutron macromolecular crystallography (NMX). This information would significantly increase our fundamental understanding of the transport processes membrane proteins undertake. To grow the large crystals needed for NMX studies requires significant amounts of stable protein, but once that challenge is overcome there is no intrinsic property of membrane proteins preventing the growth of large crystals per se. The calcium-transporting P-type ATPase (SERCA) has been thoroughly characterized biochemically and structurally over decades. We have extended our crystallization efforts to assess the feasibility of growing SERCA crystals for NMX-exploring microdialysis and capillary counterdiffusion crystallization techniques as alternatives to the traditional vapor diffusion crystallization experiment. Both methods possess crystallization dynamics favorable for maximizing crystal size and we used them to facilitate the growth of large crystals, validating these approaches for membrane protein crystallization for NMX. © 2020 Elsevier Inc. All rights reserved.By combining the normal practice for X-ray crystallography of collecting diffraction data at 100K with neutron crystallography the structures of cryo-trapped enzyme intermediates have been determined, revealing the positi
