Results 41 to 50 of about 1,756 (166)

The early expansion and evolutionary dynamics of POU class genes. [PDF]

open access: yes, 2014
The POU genes represent a diverse class of animal-specific transcription factors that play important roles in neurogenesis, pluripotency, and cell-type specification. Although previous attempts have been made to reconstruct the evolution of the POU class,
Gates, Ruth D   +2 more
core   +1 more source

Evolutionary origin of synapses and neurons – Bridging the gap [PDF]

open access: yes, 2017
The evolutionary origin of synapses and neurons is an enigmatic subject that inspires much debate. Non-bilaterian metazoans, both with and without neurons and their closest relatives already contain many components of the molecular toolkits for ...
Alberstein   +109 more
core   +3 more sources

MicroRNAs and essential components of the microRNA processing machinery are not encoded in the genome of the ctenophore Mnemiopsis leidyi

open access: yesBMC Genomics, 2012
Background MicroRNAs play a vital role in the regulation of gene expression and have been identified in every animal with a sequenced genome examined thus far, except for the placozoan Trichoplax. The genomic repertoires of metazoan microRNAs have become
Maxwell Evan K   +4 more
doaj   +1 more source

A phylogenetic survey of myotubularin genes of eukaryotes: distribution, protein structure, evolution, and gene expression [PDF]

open access: yes, 2010
Background Phosphorylated phosphatidylinositol (PtdIns) lipids, produced and modified by PtdIns kinases and phosphatases, are critical to the regulation of diverse cellular functions.
David Kerk, Greg BG Moorhead
core   +1 more source

The ventral epithelium of Trichoplax adhaerens deploys in distinct patterns cells that secrete digestive enzymes, mucus or diverse neuropeptides

open access: yesBiology Open, 2019
The disk-shaped millimeter-sized marine animal, Trichoplax adhaerens, is notable because of its small number of cell types and primitive mode of feeding.
Tatiana D. Mayorova   +4 more
doaj   +1 more source

The evolutionary history of histone H3 suggests a deep eukaryotic root of chromatin modifying mechanisms [PDF]

open access: yes, 2010
Background The phenotype of an organism is an outcome of both its genotype, encoding the primary sequence of proteins, and the developmental orchestration of gene expression.
Jan Postberg   +3 more
core   +1 more source

Support for a clade of Placozoa and Cnidaria in genes with minimal compositional bias

open access: yeseLife, 2018
The phylogenetic placement of the morphologically simple placozoans is crucial to understanding the evolution of complex animal traits. Here, we examine the influence of adding new genomes from placozoans to a large dataset designed to study the deepest ...
Christopher E Laumer   +6 more
doaj   +1 more source

Insights into the evolution of digestive systems from studies of Trichoplax adhaerens [PDF]

open access: yesCell and Tissue Research, 2019
Trichoplax, a member of the phylum Placozoa, is a tiny ciliated marine animal that glides on surfaces feeding on algae and cyanobacteria. It stands out from other animals in that it lacks an internal digestive system and, instead, digests food trapped under its lower surface.
Carolyn L. Smith, Tatiana D. Mayorova
openaire   +2 more sources

Conservation of DNA and ligand binding properties of retinoid X receptor from the placozoan Trichoplax adhaerens to human [PDF]

open access: yes, 2018
Author Posting. © The Author(s), 2018. This is the author's version of the work. It is posted here under a nonexclusive, irrevocable, paid-up, worldwide license granted to WHOI. It is made available for personal use, not for redistribution.
Fang, Bin   +5 more
core   +1 more source

Why Homoscleromorph Sponges Have Ciliated Epithelia: Evidence for an Ancestral Role in Mucociliary Driven Particle Flux

open access: yesJournal of Experimental Zoology Part B: Molecular and Developmental Evolution, Volume 344, Issue 8, Page 505-516, December 2025.
Epithelia are typically ciliated, except in sponges. Of all Porifera only Homoscleromorphs have motile cilia on their epithelia. Our data highlight the presence of cilia and mucociliary particle transport as a common feature of metazoa and a secondary loss in other sponge lineages.
Veronica L. Price   +9 more
wiley   +1 more source

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