Results 61 to 70 of about 4,300 (261)

Is the orientation of the fibrillar helix in the main layer of cell walls constant or variable within a tree?

open access: yesActa Societatis Botanicorum Poloniae, 2015
The study material consisted of samples from 270 Picea excelsa and 54 Abies alba trees with variable type of wood grain. No correlation was found between the orientation of the fibrils and the type of grain.
W. Pyszyński, Z. Hejnowicz
doaj   +1 more source

bHLH heterodimer complex variations regulate cell proliferation activity in the meristems of Arabidopsis thaliana

open access: yesiScience, 2022
Summary: Root, shoot, and lateral meristems are the main regions of cell proliferation in plants. It has been proposed that meristems might have evolved dedicated transcriptional networks to balance cell proliferation. Here, we show that basic helix-loop-
Eliana Mor   +10 more
doaj   +1 more source

Evolutionarily divergent DUF4465 domains have a common vitamin B12‐binding function

open access: yesFEBS Open Bio, EarlyView.
We show that DUF4465 family proteins, widespread across bacteria from gut microbiomes, hydrothermal vents, and soil, share a common vitamin B12‐binding function. These augmented β‐jellyroll proteins bind vitamin B12 via extended loops. Our findings establish sequence‐diverse DUF4465 proteins as a widespread class of B12‐binding proteins, highlighting ...
Charlea Clarke   +4 more
wiley   +1 more source

The pH-dependent tertiary structure of a designed helix–loop–helix dimer

open access: yes, 1997
Background: De novo designed helix–loop–helix motifs can fold into well-defined tertiary structures if residues or groups of residues are incorporated at the helix–helix boundary to form helix-recognition sites that restrict the conformational degrees of
Baltzer, Lars, Dolphin, Gunnar T
core   +1 more source

How phagocytic cells kill bacteria: Lessons from a professional killer

open access: yesFEBS Open Bio, EarlyView.
How phagocytic cells ingest and kill bacteria has been studied for more than a century, but many questions remain unanswered. The study of the amoeba Dictyostelium discoideum brings new answers, and new questions. Professional phagocytic cells such as neutrophils and macrophages, as well as free‐living soil amoebae like Dictyostelium discoideum, employ
Otmane Lamrabet, Pierre Cosson
wiley   +1 more source

Helix Folding in One Dimension: Effects of Proline Co-Solvent on Free Energy Landscape of Hydrogen Bond Dynamics in Alanine Peptides

open access: yesLife
The effects of proline co-solvent on helix folding are explored through the single discrete coordinate of the number of helical hydrogen bonds. The analysis is based on multi-microsecond length molecular dynamics simulations of alanine-based helix ...
Krzysztof Kuczera
doaj   +1 more source

Value of MRI Outcomes for Preventive and Early‐Stage Trials in Spinocerebellar Ataxias 1 and 3

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To examine the value of MRI outcomes as endpoints for preventive and early‐stage trials of two polyglutamine spinocerebellar ataxias (SCAs). Methods A cohort of 100 participants (23 SCA1, 63 SCA3, median Scale for the Assessment and Rating of Ataxia (SARA) score = 5, 42% preataxic, and 14 gene‐negative controls) was scanned at 3T up ...
Thiago J. R. Rezende   +26 more
wiley   +1 more source

A Study on the General Helix in Finsler Manifold

open access: yes, 2020
Bu çalışmada, 3-boyutlu Finsler manifoldunda iki özel eğri arasındaki ilişki üzerine çalıştık. 3-boyutlu Finslermanifoldundaki bir regüler eğri ve bir genel helis arasındaki bir denklem kullanılarak, regüler eğri ve genel helismevcut ise, o zaman regüler
Çimdiker, Muradiye, Ünlütürk, Yasin
core  

Structure–Function Decoupling of the Sensorimotor and Default Mode Networks in Black Americans With MS

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Background and Objectives Multiple sclerosis (MS) exhibits racially disparate rates of disease progression. Black people with MS (B‐PwMS) experience a more severe disease course than non‐Hispanic White people with MS (NHW‐PwMS). Here we investigated structural and functional connectivity as well as structure–function decoupling in the ...
Emilio Cipriano   +11 more
wiley   +1 more source

Generalized Fixed Polarity Helix Transforms Over Gf(4)

open access: yes, 2009
Publication in the conference proceedings of EUSIPCO, Glasgow, Scotland ...
Cheng Fu 0001, Bogdan J. Falkowski
openaire   +2 more sources

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