Results 1 to 10 of about 401,046 (255)

The Mitochondrial Myopathy, Encephalopathy, Lactic Acidosis, and Stroke-like Episode Syndrome-associated Human Mitochondrial tRNALeu(UUR) Mutation Causes Aminoacylation Deficiency and Concomitant Reduced Association of mRNA with Ribosomes [PDF]

open access: yes, 2000
The pathogenetic mechanism of the mitochondrial tRNALeu(UUR) A3243G transition associated with the mitochondrial myopathy, encephalopathy, lactic acidosis, and stroke-like episodes (MELAS) syndrome has been investigated in transmitochondrial cell lines ...
Attardi, Giuseppe   +4 more
core   +1 more source

Prebiotic chiral transfer from self-aminoacylating ribozymes may favor either handedness

open access: yesNature Communications
Modern life is essentially homochiral, containing D-sugars in nucleic acid backbones and L-amino acids in proteins. Since coded proteins are theorized to have developed from a prebiotic RNA World, the homochirality of L-amino acids observed in all known ...
Josh Kenchel   +10 more
doaj   +1 more source

The first mitochondrial genome for the subfamily Asopinae (Heteroptera: Pentatomidae) and its phylogenetic implications

open access: yesMitochondrial DNA. Part B. Resources, 2017
Here, we determined the complete mitogenome of Picromerus griseus, the first for the subfamily Asopinae. This mitochondrial genome contains 16,338 bp, with an A + T content of 71.69%, and contains 37 typical mitochondrial genes (13 protein-coding genes ...
Qing Zhao   +5 more
doaj   +1 more source

Lamarck and immunity: Somatic and germline evolution of antibody genes [PDF]

open access: yes, 2009
Current work on the mechanism of hypermutation of somatically rearranged antibody variable (V) genes shows that the most likely mechanism involves both direct DNA modification (deamination of cytosines to uracils by AID deaminase) and strand nicking plus
Steele, E.J.
core   +1 more source

Bioengineering models of cell signaling [PDF]

open access: yes, 2000
Strategies for rationally manipulating cell behavior in cell-based technologies and molecular therapeutics and understanding effects of environmental agents on physiological systems may be derived from a mechanistic understanding of underlying signaling ...
Asthagiri, Anand R.   +1 more
core   +1 more source

Transfer RNA and Origins of RNA Interference

open access: yesFrontiers in Molecular Biosciences, 2021
Andrey Grigoriev
doaj   +1 more source

Complete chloroplast genome sequence of Chrysosplenium ramosum and Chrysosplenium alternifolium (Saxifragaceae)

open access: yesMitochondrial DNA. Part B. Resources, 2020
The complete chloroplast genome of Chrysosplenium ramosum Maxim. and Chrysosplenium alternifolium L. were reported in this study. The chloroplast genomes were 153,460 bp for C. ramosum and 152,619 bp for C. alternifolium.
Wen-jie Yan   +4 more
doaj   +1 more source

Subcellular partitioning of MRP RNA assessed by ultrastructural and biochemical analysis. [PDF]

open access: yes, 1994
A small RNA encoded within the nucleus is an essential subunit of a RNA processing endonuclease (RNase MRP) hypothesized to generate primers for mitochondrial DNA replication from the heavy strand origin of replication.
Gonzalez, M   +6 more
core  

Controlled evolution of an RNA enzyme [PDF]

open access: yes
It is generally thought that prior to the origin of protein synthesis, life on earth was based on self-replicating RNA molecules. This idea has become especially popular recently due to the discovery of catalytic RNA (ribozymes).
Joyce, G. F.
core   +1 more source

Analysis of tRNA halves (tsRNAs) in serum from cattle challenged with bovine viral diarrhea virus

open access: yesGenetics and Molecular Biology
Acute infections of bovine viral diarrhea virus (BVDV) lead to a range of clinical presentations. Laboratory tests for detection depend on collection of samples during a short viremia. Acutely infected animals remain largely undiagnosed.
Tasia M. Taxis   +3 more
doaj   +1 more source

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