Results 21 to 30 of about 38,225 (233)
Evolution of the eyes of vipers with and without infrared-sensing pit organs [PDF]
, 2019 We examined lens and brille transmittance, photoreceptors, visual pigments, and visual opsin gene sequences of viperid snakes with and without infrared-sensing pit organs. Ocular media transmittance is high in both groups.
Douglas, R. H. +12 more
core +3 more sources
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 +3 more
openaire +2 more sources
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 +2 more
doaj +1 more source
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 +5 more
doaj +1 more source
Opsins: Evolution in Waiting [PDF]
Current Biology, 2005 Complete vertebrate genome sequencing has revealed a remarkable stability and uniformity in the protein-coding gene set, which at first glance might suggest that gene duplication events are relatively rare. This may be a red herring, or at least a red cichlid, as the Lake Malawi cichlid fishes show rapid and extensive duplication and diversification of
Trezise, A. E. O., Collin, S. P.
openaire +3 more sources
PLoS ONE, 2019 Vision is very important to fish as it is required for foraging food, fighting competitors, fleeing from predators, and finding potential mates. Vertebrates express opsin genes in photoreceptor cells to receive visual signals, and the variety of light ...
Chia-Hao Chang, Hong Young Yan
doaj +1 more source
Number and distribution of mouse retinal cone photoreceptors: differences between an albino (Swiss) and a pigmented (C57/BL6) strain. [PDF]
PLoS ONE, 2014 We purpose here to analyze and compare the population and topography of cone photoreceptors in two mouse strains using automated routines, and to design a method of retinal sampling for their accurate manual quantification.
Arturo Ortín-Martínez +8 more
doaj +1 more source
A low-cost hyperspectral scanner for natural imaging and the study of animal colour vision above and under water [PDF]
, 2019 Hyperspectral imaging is a widely used technology for industrial and scientific purposes, but the high cost and large size of commercial setups have made them impractical for most basic research.
Baden, T, Nevala, N E
core +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 +4 more
openaire +2 more sources
Opsin expression predicts male nuptial color in threespine stickleback. [PDF]
, 2018 Theoretical models of sexual selection suggest that male courtship signals can evolve through the build-up of genetic correlations between the male signal and female preference.
Bolnick, Daniel I +3 more
core +2 more sources