Results 81 to 90 of about 313,761 (243)

Structures of mycobacterial 3‐methylcrotonyl‐CoA carboxylase reveal carrier‐domain translocation between catalytic sites

open access: yesFEBS Letters, EarlyView.
Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav   +2 more
wiley   +1 more source

Study of spherical aberration

open access: yes, 2013
This thesis deals with the theoretical analysis of rays passing through lenses. Emphasis on optical defects, particularly focusing on spherical aberration lenses. It also includes the preparation of a workplace and the measurement of spherical aberration
Fojtík, Tomáš
core  

The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation

open access: yesFEBS Letters, EarlyView.
Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge   +6 more
wiley   +1 more source

Analysis of preoperative ocular optical parameters in patients with cataract

open access: yesBioMedical Engineering OnLine
This study aims to evaluate the distribution of preoperative corneal parameters obtained using the Pentacam anterior segment analyzer in Chinese male and female patients with cataracts and to investigate the correlation between these parameters and ...
Wenqun Xi   +8 more
doaj   +1 more source

A contralateral eye study comparing apodized diffrative and full diffrative lenses: wavefront analysis and distance and near uncorrected visual acuity

open access: yesClinics, 2009
PURPOSE: To evaluate intraindividual visual acuity, wavefront errors and modulation transfer functions in patients implanted with two diffractive multifocal intraocular lenses.
Marcony Rodrigues de Santhiago   +5 more
doaj   +1 more source

Prospecting the protein design landscape

open access: yesFEBS Letters, EarlyView.
This review outlines the current state of various protein design approaches. We discuss the current possibilities enabled by recently released tools, highlight future avenues to pursue in protein design, and underscore the crucial role of key databases and resources for successful protein design workflows.
Jakob R. Riccabona   +4 more
wiley   +1 more source

GAUSSIAN PROBE BEAM WITH HIGH SPHERICAL ABERRATION FOR REFRACTIVE INDEX MEASUREMENTS IN LIQUID SAMPLES. AN APPLICATION TO GLUCOSE CONCENTRATION [PDF]

open access: yes, 2020
"This thesis introduce a highly sensitive optical technique to measure refractive indexes of liquid transparent or turbid samples, based on measuring the heights of the primary side-lobes of the normalized intensity profiles of a focused Gaussian beam ...
Etna Yáñez
core  

L‐aspartate oxidase provides new insights into fumarate reduction in anaerobic darkness in Synechocystis sp. PCC6803

open access: yesFEBS Letters, EarlyView.
Synechocystis strains deficient in succinate dehydrogenase (SDH) secrete more succinate than the WT under dark anaerobic conditions, supporting that SDH then primarily acts as SDH, not as a fumarate reductase. L‐aspartate oxidase (Laspo) from Synechocystis is functional under anaerobic conditions, reducing fumarate to succinate.
Kateryna Kukil   +3 more
wiley   +1 more source

Study of effect of non-central obscuration to obscured circular aperture on third order spherical aberration

open access: yesمجلة بغداد للعلوم, 2012
In this research we have been studied the 3rd order spherical aberration for an optical system consisted of obscured circular aperture with non central circular obscuration through the calculation of point spread function (P.S.F) in presence of the ...
Baghdad Science Journal
doaj   +1 more source

Longitudinal spherical aberration in contact lens correction of aphakia

open access: yes, 2001
Purpose\ud \ud Correction of aphakia in infants with standard spherical contact lenses results in significant levels of positive longitudinal spherical aberration (LSA). These infants often achieve relatively poor levels of visual acuity.
Franklin, Ross   +2 more
core  

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