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Displaying 1301 - 1325 of 3312

A trapped human PPM1A-phosphopeptide complex reveals structural features critical for regulation of PPM protein phosphatase activity

May 24, 2018
Author(s)
Subrata Debnath, Dalibor Kosek, Harichandra Tagad, Stewart R. Durell, Daniel Appella, Roderico Acevedo, Alexander Grishaev, Fred Dyda, Ettore Appella, Sharlyn Mazur
… two tightly bound metal ions and an additional third metal ion in the active site. Here, the crystal structure of the … confirmed the presence of the anticipated third metal ion in the active site of metazoan PPM phosphatases. … between the bound substrate and the labile metal ion. This work illuminates the structural and thermodynamic …

Molecular Oxygen (O2) Artifacts in Tandem Mass Spectra

November 20, 2024
Author(s)
Yuxue Liang, Pedatsur Neta, Xiaoyu (Sara) Yang, Hugo Garraffo, Tallat Bukhari, Yi Liu, Stephen Stein
… peak that could only be assigned to a peroxyl radical ion. For example, some protonated iodo-aromatics lose iodine … which reacts with O2 to generate a peroxyl radical ion [M+H-I+O2]+·. To confirm the O2 adduction, five compounds … radical peaks, which become dominant while the precursor ion peaks are consumed. The correlation of the peroxyl …

Energetics of Li Atom Displacements in K1-xLixTa03: First-Principles Calculations

July 1, 2003
Author(s)
S A. Prosandeev, Eric J. Cockayne, Benjamin P. Burton
K 1-xLi xTaO 3 (KLT) solid solutions exhibit a variety of interesting physical phenomena related to large local displacements of Li-ions from ideal perovskite A-site positions. First-principles calculations for KLT supercells were used to investigate these

Lattice damage in superconducting microcalorimeter detectors

June 3, 2013
Author(s)
Robert D. Horansky, Joel N. Ullom, Michael W. Rabin
… in using superconducting detectors for measurement of ion kinetic energies. Unprecedented resolution is possible … we will calculate the expected resolution limits due to ion damage, as well as use the Monte Carlo simulation SRIM to …

Comparison of AlGaAs oxidation in MBE and MOCVD grown samples

January 1, 2002
Author(s)
Y Chen, Alexana Roshko, Kristine A. Bertness, Dennis W. Readey, Marc A. Mansfield, M. Tan, A. Tandon
… showed that the oxidation rate was not affected by the V/III ratio during growth nor by impurities at concentrations …
Displaying 1301 - 1325 of 3312
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