Results 11 to 20 of about 1,321 (169)

A major allogenic leukocyte antigen in the agnathan hagfish [PDF]

open access: yesScientific Reports, 2013
All vertebrates, from jawless fish to mammals, possess adaptive immune systems that can detect and inactivate non-self-antigens through a vast repertoire of antigen receptors. Unlike jawed vertebrates, the hagfish utilizes variable lymphocyte receptors (VLRs) that are unrelated to immunoglobulin molecules but are diversified by copy-choice gene ...
Hiroyuki Takaba   +7 more
openaire   +2 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

Cambrian Chordates and Vetulicolians

open access: yesGeosciences, 2019
Deuterostomes make a sudden appearance in the fossil record during the early Cambrian. Two bilaterian groups, the chordates and the vetulicolians, are of particular interest for understanding early deuterostome evolution, and the main objective of this ...
Mark A. S. McMenamin
doaj   +1 more source

Maximum local helminth parasite community richness in British freshwater fish : a test of the colonization time hypothesis [PDF]

open access: yes, 1993
The investigation of Price & Clancy (1983), which demonstrated a significant positive correlation between total helminth species number per host species and geographical range of freshwater fish host species in Britain, was re-examined using a different ...
Guégan, Jean-François, Kennedy, C.R.
core   +1 more source

Spatiotemporal pattern of doublecortin expression in the retina of the sea lamprey

open access: yesFrontiers in Neuroanatomy, 2016
Despite the importance of doublecortin (DCX) for the development of the nervous system, its expression in the retina of most vertebrates is still unknown.
Blanca eFernández-López   +5 more
doaj   +1 more source

Hippocampal pallium and map-like memories through vertebrate evolution [PDF]

open access: yes, 2015
The hippocampus in humans and other mammals is essential for episodic and relational memories. Comparative evidence indicates that a hippocampal pallium homologue is present in birds, reptiles, amphibians, ray-finned fishes, cartilaginous fishes and ...
Broglio Schenon, Cristina   +6 more
core   +1 more source

Development and organization of the lamprey telencephalon with special reference to the GABAergic system

open access: yesFrontiers in Neuroanatomy, 2011
Lampreys, together with hagfishes, represent the sister group of gnathostome vertebrates. There is an increasing interest for comparing the forebrain organization observed in lampreys and gnathostomes to shed light on vertebrate brain evolution.
Manuel A Pombal   +4 more
doaj   +1 more source

Evolution of antigen binding receptors [PDF]

open access: yes, 1999
This review addresses issues related to the evolution of the complex multigene families of antigen binding receptors that function in adaptive immunity.
Anderson, Michele K.   +2 more
core   +1 more source

An inhibitory receptor of VLRB in the agnathan lamprey [PDF]

open access: yesScientific Reports, 2016
AbstractLamprey, the primitive jawless vertebrate, uses variable lymphocyte receptor (VLR) as alternative adaptive immune system instead of immunoglobulin (Ig)-based receptors used in jawed vertebrates. In the present study, we characterized a potential inhibitory receptor of VLRB from leucocytes in lamprey.
Fenfang Wu   +7 more
openaire   +2 more sources

Lampreys have a single gene cluster for the fast skeletal myosin heavy chain gene family. [PDF]

open access: yesPLoS ONE, 2013
Muscle tissues contain the most classic sarcomeric myosin, called myosin II, which consists of 2 heavy chains (MYHs) and 4 light chains. In the case of humans (tetrapod), a total of 6 fast skeletal-type MYH genes (MYHs) are clustered on a single ...
Daisuke Ikeda   +4 more
doaj   +1 more source

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