Results 21 to 30 of about 10,883 (294)

Hypothesis and Theory: Evaluating the Co-Evolution of the Melanocortin-2 Receptor and the Accessory Protein MRAP1

open access: yesFrontiers in Endocrinology, 2021
The melanocortin receptors (MCRs) and the MRAP accessory proteins belong to distinct gene families that are unique to the chordates. During the radiation of the chordates, the melancortin-2 receptor paralog (MC2R) and the MRAP1 paralog (melanocortin-2 ...
Robert M. Dores, Emilia Chapa
doaj   +1 more source

Afferent connections of the valvula cerebelli in two teleosts, the common goldfish and the green sunfish [PDF]

open access: yes, 1989
The afferent connections of the valvula cerebelli were examined in one cypriniform teleost (Carassius auratus) and one perciform teleost (Lepomis cyanellus) with the use of horseradish peroxidase as a retrograde tracer.
Bell   +43 more
core   +1 more source

Basal jawed vertebrate phylogeny inferred from multiple nuclear DNA-coded genes

open access: yesBMC Biology, 2004
Background Phylogenetic analyses of jawed vertebrates based on mitochondrial sequences often result in confusing inferences which are obviously inconsistent with generally accepted trees.
Ishida Osamu   +6 more
doaj   +1 more source

Simultaneously operating threats cannot predict extinction risk

open access: yesConservation Letters, 2021
Species afflicted by multiple threats are thought to face greater extinction risk. However, it is not known whether multiple threats operate antagonistically, additively, or synergistically, or whether they vary across different taxonomic and spatial ...
Aaron C. Greenville   +5 more
doaj   +1 more source

Industrial application of fish cartilaginous tissues

open access: yesCurrent Research in Food Science, 2022
Cartilage is primarily composed of proteoglycans and collagen. Bioactive compounds derived from animal cartilage, such as chondroitin sulfate and type II collagen, have multiple bioactivities and are incorporated in popular health products. The aging population and increases in degenerative and chronic diseases will stimulate the rapid growth of market
Li, Wen, Ura, Kazuhiro, Takagi, Yasuaki
openaire   +4 more sources

The self-organization of genomes [PDF]

open access: yes, 2010
Menzerath-Altmann law is a general law of human language stating, for instance, that the longer a word, the shorter its syllables. With the metaphor that genomes are words and chromosomes are syllables, we examine if genomes also obey the law.
Ferrer Cancho, Ramon   +1 more
core   +2 more sources

Phylotranscriptomics suggests the jawed vertebrate ancestor could generate diverse helper and regulatory T cell subsets

open access: yesBMC Evolutionary Biology, 2018
Background The cartilaginous fishes diverged from other jawed vertebrates ~ 450 million years ago (mya). Despite this key evolutionary position, the only high-quality cartilaginous fish genome available is for the elephant shark (Callorhinchus milii), a ...
Anthony K. Redmond   +2 more
doaj   +1 more source

Connections of the corpus cerebelli in the green sunfish and the common goldfish [PDF]

open access: yes, 1988
Examination of the connections of the corpus cerebelli in one perciform (Lepomis cyanellus) and one cypriniform teleost (Carassius auratus) reveal that ipsilateral afferent connections in both species arise from an anterior group of nuclei in the ...
Northcutt, R. Glenn, Wullimann, Mario F.
core   +1 more source

Características histológicas del útero de Sympterygia acuta (Garman, 1877) y Sympterygia bonapartii (Müller & Henle, 1841) (Chondrichthyes; Rajidae) [PDF]

open access: yes, 2013
Los condrictios constituyen un clado sumamente conservado y vulnerable a la explotación, que ha cobrado una importancia creciente en los últimos años. Sin embargo, existe poca información sobre los aspectos morfológicos relacionados con la reproducción ...
Díaz Andrade, María Constanza   +2 more
core   +1 more source

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