Results 41 to 50 of about 837,608 (280)
Os semimetais na origem e evolução da vida
Química Nova, 2012 Metalloids have characteristics between metals and non-metals which give them, in some cases, specific properties. At least two of this chemical elements, boron and silicon, are essential to a significant number of living organisms and since some years ...
Manuel Aureliano +3 more
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Identification of Novel Fibrosis Modifiers by In Vivo siRNA Silencing. [PDF]
, 2017 Fibrotic diseases contribute to 45% of deaths in the industrialized world, and therefore a better understanding of the pathophysiological mechanisms underlying tissue fibrosis is sorely needed.
Amatucci, Aldo +16 more
core +2 more sources
Key steps from the “RNA World” to the “DNA World”
BIO Web of Conferences, 2014 In the « RNA World » hypothesis of the origin of life, RNAs are assumed to be the central macromolecules able to self-replicate, conserve information and catalyze the reactions necessary for a primitive metabolism and many enzymatic cofactors may be ...
Renard B.-L. +3 more
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A creature with a hundred waggly tails: intrinsically disordered proteins in the ribosome [PDF]
, 2013 This article is made available for unrestricted research re-use and secondary analysis in any form or by any means with acknowledgement of the original source.
Dunker, A. Keith +6 more
core +2 more sources
Origin of symbol-using systems: speech, but not sign, without the semantic urge [PDF]
, 2014 Natural language—spoken and signed—is a multichannel phenomenon, involving facial and body expression, and voice and visual intonation that is often used in the service of a social urge to communicate meaning.
Alberts B +27 more
core +2 more sources
Evolution in an RNA World [PDF]
Cold Spring Harbor Symposia on Quantitative Biology, 2009 A long-standing research goal has been to develop a self-sustained chemical system that is capable of undergoing Darwinian evolution. The notion of primitive RNA-based life suggests that this goal might be achieved by constructing an RNA enzyme that catalyzes the replication of RNA molecules, including the RNA enzyme itself.
openaire +2 more sources
A Faster Triphosphorylation Ribozyme. [PDF]
, 2015 In support of the RNA world hypothesis, previous studies identified trimetaphosphate (Tmp) as a plausible energy source for RNA world organisms. In one of these studies, catalytic RNAs (ribozymes) that catalyze the triphosphorylation of RNA 5'-hydroxyl ...
Akoopie, Arvin +2 more
core +4 more sources
Riboswitches and the RNA World [PDF]
Cold Spring Harbor Perspectives in Biology, 2010 Riboswitches are structured noncoding RNA domains that selectively bind metabolites and control gene expression (Mandal and Breaker 2004a; Coppins et al. 2007; Roth and Breaker 2009). Nearly all examples of the known riboswitches reside in noncoding regions of messenger RNAs where they control transcription or translation.
openaire +2 more sources
Pediatric Blood &Cancer, EarlyView.ABSTRACT Objective To evaluate selumetinib exposure using therapeutic drug monitoring (TDM) in pediatric patients with neurofibromatosis type 1 (NF1) and plexiform neurofibromas (PN), assess interpatient pharmacokinetic variability, and explore the relationship between drug exposure, clinical response, and adverse effects.
Janka Kovács +8 more
wiley +1 more source
The secret life of RNA and lipids
RNA BiologyThere is no life without RNA or lipids. But could there be life with only RNA and lipids? The discovery that RNA can catalyse reactions in addition to encoding information opened new directions for engineering life and the possibility of life emerging ...
Tomasz Czerniak, James P Saenz
doaj +1 more source