Results 31 to 40 of about 13,329,719 (303)

Gene Gain and Gene Loss in Streptococcus: Is It Driven by Habitat? [PDF]

open access: yesMolecular Biology and Evolution, 2006
Bacterial genomes can evolve either by gene gain, gene loss, mutating existing genes, and/or by duplication of existing genes. Recent studies have clearly demonstrated that the acquisition of new genes by lateral gene transfer (LGT) is a predominant force in bacterial evolution.
Pradeep Reddy, Marri   +2 more
openaire   +2 more sources

The Complete Plastome Sequences of Seven Species in Gentiana sect. Kudoa (Gentianaceae): Insights Into Plastid Gene Loss and Molecular Evolution

open access: yesFrontiers in Plant Science, 2018
The chloroplast (cp) genome is useful in the study of phylogenomics, molecular dating, and molecular evolution. Gentiana sect. Kudoa is a predominantly alpine flowering plant that is valued for its contributions to medicine, ecology, and horticulture ...
Shan-Shan Sun   +8 more
doaj   +1 more source

The Mercury Resistance Operon: From an Origin in a Geothermal Environment to an Efficient Detoxification Machine

open access: yesFrontiers in Microbiology, 2012
Mercuric mercury (Hg[II]) is a highly toxic and mobile element that is likely to have had a pronounced and adverse effect on biology since Earth’s oxygenation ~2.4 Gy ago due to its high affinity for protein sulfhydryl groups, which upon binding ...
Eric eBoyd, Tamar eBarkay
doaj   +1 more source

Transit From Autotrophism to Heterotrophism: Sequence Variation and Evolution of Chloroplast Genomes in Orobanchaceae Species

open access: yesFrontiers in Genetics, 2020
The family Orobanchaceae including autotrophic, hemiparasitic, and holoparasitic species, is becoming a key taxa to study the evolution of chloroplast genomes in different lifestyles. But the early evolutionary trajectory in the transit from autotrophism
Ruiting Zhang   +8 more
doaj   +1 more source

The Complete Plastomes of Five Hemiparasitic Plants (Osyris wightiana, Pyrularia edulis, Santalum album, Viscum liquidambaricolum, and V. ovalifolium): Comparative and Evolutionary Analyses Within Santalales

open access: yesFrontiers in Genetics, 2020
Most species of Santalales (the sandalwood order) are hemiparasites, including both facultative and obligate hemiparasites. Despite its rich diversity, only a small fraction of the species in the sandalwood order have sequenced plastomes.
Xiaorong Guo   +8 more
doaj   +1 more source

Parallel Losses of Blue Opsin Correlate with Compensatory Neofunctionalization of UV-Opsin Gene Duplicates in Aphids and Planthoppers

open access: yesInsects, 2023
Expanding on previous efforts to survey the visual opsin repertoires of the Hemiptera, this study confirms that homologs of the UV- and LW-opsin subfamilies are conserved in all Hemiptera, while the B-opsin subfamily is missing from the Heteroptera and ...
Markus Friedrich
doaj   +1 more source

Gene Loss Predictably Drives Evolutionary Adaptation

open access: yesMolecular biology and evolution, 2020
Loss of gene function is common throughout evolution, even though it often leads to reduced fitness. In this study, we systematically evaluated how an organism adapts after deleting genes that are important for growth under oxidative stress. By evolving,
Jana Helsen   +6 more
semanticscholar   +1 more source

GENE LOSS IN HUMAN TERATOMAS [PDF]

open access: yesProceedings of the National Academy of Sciences, 1969
If benign cystic teratomas (dermoid cysts) of the ovary arise from a germ cell that has undergone meiosis, they should be missing genes which are present in the person. Three independently segregating allelic isozymes in 11 benign cystic teratomas of the human female ovary were compared with normal tissue of the same case.
openaire   +2 more sources

Evolutionary Histories of Type III Polyketide Synthases in Fungi

open access: yesFrontiers in Microbiology, 2020
Type III polyketide synthases (PKSs) produce secondary metabolites with diverse biological activities, including antimicrobials. While they have been extensively studied in plants and bacteria, only a handful of type III PKSs from fungi has been ...
Jorge Carlos Navarro-Muñoz   +1 more
doaj   +1 more source

Gene Loss and Acquisition in Lineages of Pseudomonas aeruginosa Evolving in Cystic Fibrosis Patient Airways

open access: yesmBio, 2020
Bacterial airway infections, predominantly caused by P. aeruginosa, are a major cause of mortality and morbidity of CF patients. While short insertions and deletions as well as point mutations occurring during infection are well studied, there is a lack ...
M. Gabrielaitė   +4 more
semanticscholar   +1 more source

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