Results 1 to 10 of about 6,802,541 (195)

Loss of Plastid Developmental Genes Coincides With a Reversion to Monoplastidy in Hornworts

open access: yesFrontiers in Plant Science, 2022
The first plastid evolved from an endosymbiotic cyanobacterium in the common ancestor of the Archaeplastida. The transformative steps from cyanobacterium to organelle included the transfer of control over developmental processes, a necessity for the host
Alexander I. MacLeod   +5 more
doaj   +1 more source

Evaluation of intra- and interspecific divergence of satellite DNA sequences by nucleotide frequency calculation and pairwise sequence comparison

open access: yesBiological Procedures Online, 2003
Satellite DNA sequences are known to be highly variable and to have been subjected to concerted evolution that homogenizes member sequences within species.
Kato Mikio
doaj   +1 more source

Linking molecular evolution to molecular grafting [PDF]

open access: yesJournal of Biological Chemistry, 2021
Molecular grafting is a strategy for the engineering of molecular scaffolds into new functional agents, such as next-generation therapeutics. Despite its wide use, studies so far have focused almost exclusively on demonstrating its utility rather than understanding the factors that lead to either poor or successful grafting outcomes.
Conan K. Wang, David J. Craik
openaire   +3 more sources

Microbial Community Structure Driven by a Volcanic Gradient in Glaciers of the Antarctic Archipelago South Shetland

open access: yesMicroorganisms, 2021
It has been demonstrated that the englacial ecosystem in volcanic environments is inhabited by active bacteria. To know whether this result could be extrapolated to other Antarctic glaciers and to study the populations of microeukaryotes in addition to ...
Eva García-Lopez   +6 more
doaj   +1 more source

Cancer Molecular Evolution [PDF]

open access: yesJournal of Molecular Evolution, 2015
By far, the majority of studies in molecular evolution have focused on genetic change across one or more generations. Much less is known about the genetic changes that occur during the life time of an individual, or somatic evolution, of which cancer is probably the best-known example.
openaire   +4 more sources

Major Changes in Plastid Protein Import and the Origin of the Chloroplastida

open access: yesiScience, 2020
Summary: Core components of plastid protein import and the principle of using N-terminal targeting sequences are conserved across the Archaeplastida, but lineage-specific differences exist.
Michael Knopp   +3 more
doaj   +1 more source

Molecular Evolution of Aphthoviruses

open access: yesVirus Genes, 1995
Aphthoviruses are an important group of animal pathogens. A combination of genetic and structural studies has revealed one of the main principles governing their evolution: severe limitations to variation imposed by functional and structural constraints, in conjunction with high mutation and recombination rates operating during genome replication ...
Domingo, Esteban   +7 more
openaire   +4 more sources

DNA Polymerases Engineered by Directed Evolution to Incorporate Nonstandard Nucleotides

open access: yesFrontiers in Microbiology, 2014
DNA polymerases have evolved for billions of years to accept natural nucleoside triphosphate substrates with high fidelity and to exclude closely related structures, such as the analogous ribonucleoside triphosphates. However, polymerases that can accept
Roberto eLaos   +2 more
doaj   +1 more source

THE MOLECULAR EVOLUTION OF ACTIN [PDF]

open access: yesGenetics, 1986
ABSTRACT We have investigated the molecular evolution of plant and nonplant actin genes comparing nucleotide and amino acid sequences of 20 actin genes. Nucleotide changes resulting in amino acid substitutions (replacement substitutions) ranged from 3-7% for all pairwise comparisons of animal actin genes with the following exceptions ...
Richard B. Meagher, R.C. Hightower
openaire   +3 more sources

Elusive data underlying debate at the prokaryote-eukaryote divide

open access: yesBiology Direct, 2018
Background The origin of eukaryotic cells was an important transition in evolution. The factors underlying the origin and evolutionary success of the eukaryote lineage are still discussed.
Marie Gerlitz   +4 more
doaj   +1 more source

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