Results 51 to 60 of about 70,841 (213)

The Role of Soluble Adenylyl Cyclase in the Regulation of Flagellar Motility in Ascidian Sperm

Biomolecules, 2023
Flagellar motility in sperm is activated and regulated by factors related to the eggs at fertilization. In the ascidian Ciona intestinalis, a sulfated steroid called the SAAF (sperm activating and attracting factor) induces both sperm motility activation
Kogiku Shiba, Kazuo Inaba
doaj   +1 more source

ParaHox Genes Revisited: From Gut Patterning to Integrated Axial and Neural Organization in Rotifera

Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, EarlyView.
In rotifers, ParaHox genes show a dispersed genomic organization, with Xlox absent across gnathiferans. Exclusive neuronal expression of Gsx and Cdx reveals that ancestral ParaHox genes coordinated neural and epithelial development beyond gut patterning, suggesting an integrated role in early bilaterian body plan organization.
Andreas C. Fröbius, David B. Mark Welch, Holger Herlyn   +2 more
wiley   +1 more source

Maintenance of Constant Wave Parameters by Sperm Flagella at Reduced Frequencies of Beat [PDF]

, 1973
1. Treatment of Ciona spermatozoa with low concentrations of Triton X-100 (less than 0·01 %) causes them to beat at lower than normal frequencies. The wavelength of the flagellar bending waves remains constant over the range from 10 to 40 Hz.
Brokaw, C. J., Josslin, R.
core  

Independent elaboration of steroid hormone signaling pathways in Metazoans [PDF]

, 2009
Steroid hormones regulate many physiological processes in vertebrates, nematodes and arthropods through binding to nuclear receptors (NR), a metazoan-specific family of ligand-activated transcription factors.
Barbara A. Demeneix, Chantal Dauphin-Villemant, Gabriel V. Markov, Michael E. Baker, Raquel Tavares, Vincent Laudet   +5 more
core   +4 more sources

Major ascidian species with negative impacts on bivalve aquaculture: Current knowledge and future research aims

Open Geosciences
Biofouling constitutes one of the main obstacles in the sector of shellfish farming. Under this perspective, it is of highly importance to critically combine the updated information regarding the invasive potential of ascidian species, together with the ...
Alvanou Maria V., Feidantsis Konstantinos, Papadopoulos Dimitrios K., Lattos Athanasios, Theodorou John A., Michaelidis Basile, Giantsis Ioannis A.   +6 more
doaj   +1 more source

The Embryonic Development of the Cotylean Polyclad Phrikoceros jannetae

Acta Zoologica, EarlyView.
ABSTRACT Polyclads exhibit distinct developmental modes ranging from direct to indirect development, with several transitional stages also recognised. The existence of an indirect developmental mode in polyclads with a planktonic life history stage in the form of a free‐swimming larva is unique among all free‐living flatworms and makes polyclads a ...
Mehrez Gammoudi, Bernhard Egger, Isabel L. Dittmann, Verónica N. Bulnes, Pavel Tomancak, Abdel Halim Harrath, Johannes Girstmair   +6 more
wiley   +1 more source

Identification and population genetic comparison of three ascidian species based on mtDNA sequences

Ecology and Evolution, 2020
Ascidians are sessile marine chordate invertebrates found along seashores worldwide and are typically regarded as invasive organisms. Knowledge concerning their global genetic structure and subsequent invasive potential is limited.
Punit Bhattachan, Runyu Qiao, Bo Dong
doaj   +1 more source

The Greenland–Scotland Ridge in a Changing Ocean: Time to Act?

Marine Ecology, EarlyView.
ABSTRACT The Greenland–Scotland Ridge is a submarine mountain that rises up to 500 m below the sea surface and extends from the east coast of Greenland to the continental shelf of Iceland and across the Faroe Islands to Scotland. The ridge not only separates deeper ocean basins on either side, that is, the North Atlantic and Arctic oceans, but also ...
Christophe Pampoulie, Saskia Brix, Haseeb S. Randhawa   +2 more
wiley   +1 more source

Functional Divergence of Glycoprotein Hormone Receptors [PDF]

, 2010
Two lamprey glycroprotein hormone receptors (lGpH-R I and II) highly similar with gnathostome GpH-Rs were cloned from sea lamprey testes and thyroid, respectively.
Freamat, Mihael, Sower, Stacia A.
core   +3 more sources

Binding Mode Analysis of Antifouling Compounds Targeting Tyrosinase and Acetylcholinesterase by Saturation Transfer Difference NMR Spectroscopy

ChemBioChem, Volume 27, Issue 8, April 2026.
Mussels are key macrofoulers targeted by antifouling (AF) strategies, yet few molecular targets have been explored to guide the development of new ecofriendly agents. Here, saturation transfer difference‐nuclear magnetic resonance (STD‐NMR) is used to investigate the interactions between AF compounds and settlement‐related enzymes, namely, tyrosinase ...
Ana Sara Gomes, Mariana Andrade, Diana I. S. P. Resende, Sara M. Cravo, Emília Sousa, Marta Correia‐da‐Silva   +5 more
wiley   +1 more source