Results 31 to 40 of about 26,493 (243)

A fish eye out of water: ten visual opsins in the four-eyed fish, Anableps anableps. [PDF]

PLoS ONE, 2009
The "four-eyed" fish Anableps anableps has numerous morphological adaptations that enable above and below-water vision. Here, as the first step in our efforts to identify molecular adaptations for aerial and aquatic vision in this species, we describe ...
Gregory L Owens, Diana J Windsor, Justin Mui, John S Taylor   +3 more
doaj   +1 more source

S-opsin knockout mice with the endogenous M-opsin gene replaced by an L-opsin variant [PDF]

Visual Neuroscience, 2013
AbstractSpecific variants of human long-wavelength (L) and middle-wavelength (M) cone opsin genes have recently been associated with a variety of vision disorders caused by cone malfunction, including red-green color vision deficiency, blue cone monochromacy, myopia, and cone dystrophy. Strikingly, unlike disease-causing mutations in rhodopsin, most of
Scott H, Greenwald, James A, Kuchenbecker, Daniel K, Roberson, Maureen, Neitz, Jay, Neitz   +4 more
openaire   +2 more sources

The Evolution Of Colouration And Opsins In Tarantulas [PDF]

Proceedings of the Royal Society B: Biological Sciences, 2020
ABSTRACT Tarantulas paradoxically exhibit a diverse palette of vivid colouration despite their crepuscular to nocturnal habits. The evolutionary origin and maintenance of these colours remains a mystery. In this study, we reconstructed the ancestral states of both blue and green colouration in tarantula setae, and tested how these ...
Foley, Saoirse, Saranathan, Vinodkumar, Piel, William H.   +2 more
openaire   +3 more sources

Developmental dynamics of cone photoreceptors in the eel [PDF]

, 2009
Background: Many fish alter their expressed visual pigments during development. The number of retinal opsins expressed and their type is normally related to the environment in which they live.
Bowmaker, JK, Ma'ayan Semo, Semo, M, Glen Jeffery, Phillippa B Cottrill, Jeffery, G, James K Bowmaker, David M Hunt, Hunt, DM, Davies, WL, Wayne L Davies, Cottrill, PB   +11 more
core   +1 more source

A live cell assay of GPCR coupling allows identification of optogenetic tools for controlling Go and Gi signaling

BMC Biology, 2018
Background Animal opsins are light-sensitive G-protein-coupled receptors (GPCRs) that enable optogenetic control over the major heterotrimeric G-protein signaling pathways in animal cells.
Edward R. Ballister, Jessica Rodgers, Franck Martial, Robert J. Lucas   +3 more
doaj   +1 more source

Mechanisms of Opsin Activation [PDF]

Journal of Biological Chemistry, 1996
Rhodopsin is constrained in an inactive conformation by interactions with 11-cis-retinal including formation of a protonated Schiff base with Lys296. Upon photoisomerization, major structural rearrangements that involve protonation of the active site Glu113 and cytoplasmic acidic residues, including Glu134, lead to the formation of the active form of ...
J, Buczyłko, J C, Saari, R K, Crouch, K, Palczewski   +3 more
openaire   +2 more sources

Testing sensory drive speciation in cichlid fish: Linking light conditions to opsin expression, opsin genotype and female mate preference [PDF]

, 2020
Ecological speciation is facilitated when divergent adaptation has direct effects on selective mating. Divergent sensory adaptation could generate such direct effects, by mediating both ecological performance and mate selection. In aquatic environments,
Seehausen, Ole, van Eijk, Roel, Daniel Shane Wright, Ton G. G. Groothuis, Maan, Martine E., Eijk, Roel, Schuart, Lisa, Lisa Schuart, Ole Seehausen, Maan, Martine E.; id_orcid, Wright, Daniel Shane, Groothuis, Ton G.G., Eijk, Roel, van, Groothuis, Ton G. G., Martine E. Maan, Roel van Eijk   +15 more
core   +1 more source

Opsin clines in butterflies suggest novel roles for insect photopigments [PDF]

, 2014
Free to read\ud \ud Opsins are ancient molecules that enable animal vision by coupling to a vitamin-derived chromophore to form lightsensitive photopigments.
Briscoe, Adriana D., Adriana D. Briscoe, Bernard, Gary D, Briscoe, Adriana D, Wesley K. Savage, Frentiu, Francesca D, Gary D. Bernard, Mullen, Sean P., Mullen, Sean P, Furong Yuan, Sean P. Mullen, Yuan, Furong, Bernard, Gary D., Savage, Wesley K., Francesca D. Frentiu, Savage, Wesley K, Frentiu, Francesca D.   +16 more
core   +1 more source

The evolution of insect visual opsin genes with specific consideration of the influence of ocelli and life history traits

BMC Ecology and Evolution, 2022
Background Visual opsins are expressed in the compound eyes and ocelli of insects and enable light detection. Three distinct phylogenetic groups of visual opsins are found in insects, named long (LW), short (SW) and ultraviolet (UV) wavelength sensitive ...
Quentin Guignard, Jeremy D. Allison, Bernard Slippers   +2 more
doaj   +1 more source

Genomic and gene regulatory signatures of cryptozoic adaptation: Loss of blue sensitive photoreceptors through expansion of long wavelength-opsin expression in the red flour beetle Tribolium castaneum

Frontiers in Zoology, 2007
Background Recent genome sequence analysis in the red flour beetle Tribolium castaneum indicated that this highly crepuscular animal encodes only two single opsin paralogs: a UV-opsin and a long wavelength (LW)-opsin; however, these animals do not encode
Cook Tiffany A, McDonald Elizabeth C, Liu Zhenyi, Bao Riyue, Jackowska Magdalena, Friedrich Markus   +5 more
doaj   +1 more source