Results 31 to 40 of about 20,472 (223)

Sequencing and analysis of the gastrula transcriptome of the brittle star Ophiocoma wendtii [PDF]

open access: yes, 2012
Background The gastrula stage represents the point in development at which the three primary germ layers diverge. At this point the gene regulatory networks that specify the germ layers are established and the genes that define the differentiated states ...
Garey, James R.   +4 more
core   +2 more sources

Long-term change in benthopelagic fish abundance in the abyssal northeast Pacific Ocean [PDF]

open access: yes, 2006
Food web structure, particularly the relative importance of bottom-up and top-down control of animal abundances, is poorly known for the Earth's largest habitats: the abyssal plains.
Bailey, D.M., Ruhl, H.A., Smith, K.
core   +1 more source

Biochemical, Anatomical, and Pharmacological Characterization of Calcitonin-Type Neuropeptides in Starfish: Discovery of an Ancient Role as Muscle Relaxants

open access: yesFrontiers in Neuroscience, 2018
Calcitonin (CT) is a peptide hormone released by the thyroid gland that regulates blood Ca2+ levels in mammals. The CT gene is alternatively spliced, with one transcript encoding CT and another transcript encoding the CT-like neuropeptide calcitonin-gene
Weigang Cai   +7 more
doaj   +1 more source

Neuropeptidergic Systems in Pluteus Larvae of the Sea Urchin Strongylocentrotus purpuratus: Neurochemical Complexity in a “Simple” Nervous System

open access: yesFrontiers in Endocrinology, 2018
The nervous system of the free-living planktonic larvae of sea urchins is relatively “simple,” but sufficiently complex to enable sensing of the environment and control of swimming and feeding behaviors.
Natalie J. Wood   +10 more
doaj   +1 more source

Calcium-induced asymmetrical beating of triton-demembranated sea urchin sperm flagella [PDF]

open access: yes, 1979
Asymmetrical bending waves can be obtained by reactivating demembranated sea urchin spermatozoa at high Ca2+ concentrations. Moving-film flash photography shows that asymmetrical flagellar bending waves are associated with premature termination of the ...
Brokaw, C. J.
core   +2 more sources

The Role of the Microbiota in Regeneration-Associated Processes

open access: yesFrontiers in Cell and Developmental Biology, 2022
The microbiota, the set of microorganisms associated with a particular environment or host, has acquired a prominent role in the study of many physiological and developmental processes.
Lymarie M. Díaz-Díaz   +2 more
doaj   +1 more source

Taxonomic revision and phylogeny of the Ophiocoma brevipes group (Echinodermata, Ophiuroidea) : with description of a new subgenus (Breviturma) and a new species [PDF]

open access: yes, 2013
The taxonomy of the genus Ophiocoma was last revised by Devaney in 1970. Recent discoveries of new species and re-instatement of previously synonymized names suggest that we still do not fully understand the species limits in this genus.
Boissin, Emilie   +2 more
core   +3 more sources

The evolution and variety of RFamide-type neuropeptides: insights from deuterostomian invertebrates [PDF]

open access: yes, 2014
Five families of neuropeptides that have a C-terminal RFamide motif have been identified in vertebrates: (1) gonadotropin-inhibitory hormone (GnIH), (2) neuropeptide FF (NPFF), (3) pyroglutamylated RFamide peptide (QRFP), (4) prolactin-releasing peptide (
Elphick, MR, Mirabeau, O
core   +1 more source

Holothurian Fucosylated Chondroitin Sulfate

open access: yesMarine Drugs, 2014
Fucosylated chondroitin sulfate (FucCS) is a structurally distinct glycosaminoglycan found in sea cucumber species. It has the same backbone composition of alternating 4-linked glucuronic acid and 3-linked N-acetyl galactosamine residues within ...
Vitor H. Pomin
doaj   +1 more source

The neuropeptide transcriptome of a model echinoderm, the sea urchin Strongylocentrotus purpuratus [PDF]

open access: yes, 2012
The work reported here was supported by a grant from the University of London Central Research ...
Elphick, MR, Rowe, ML
core   +1 more source

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