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  • zebrafish
  • A comparison of biochemical features for these paralogous opsins in two model teleosts, Fugu pufferfish (Takifugu rubripes) and zebrafish (Danio rerio), reveals striking differences. (ox.ac.uk)
  • pineal
  • While spectral sensitivity is largely unaltered by specialization to the pineal environment, in other aspects exo-rod opsins exhibit a behavior that is quite distinct from the cardinal features of the rod opsin family. (ox.ac.uk)
  • sensitivity
  • Our findings suggest that the requirements of non-image-forming photoreception have lead exo-rod opsin to adopt a characteristic that seemingly favors efficient bleach recovery but not at the expense of absolute sensitivity. (ox.ac.uk)
  • circadian
  • Over the recent years, distinct non-rod non-cone photopigments have been found to support circadian photoreception in diverse species. (ox.ac.uk)
  • pigments
  • The effect of hydrostatic pressure (0.1-54 MPa, equivalent to pressures experienced by fish from the ocean's surface to depths of ca. 5400 m) on visual pigment absorption spectra was investigated for rod visual pigments extracted from the retinae of 12 species of deep-sea fish of diverse phylogeny and habitat. (biologists.org)
  • We have therefore measured the visual pigment absorption spectra of extracts of rod pigments from 12 species of mesopelagic and demersal deep-sea fish when subjected to pressures of up to 54 MPa. (biologists.org)
  • Phylogeny
  • However, the relationship between lungfish, the coelacanth and tetrapods could not be absolutely determined from opsin phylogeny, supporting an unresolved trichotomy between the three groups. (nih.gov)
  • SWS1
  • The common ancestor of all vertebrates possessed two short wavelength-sensitive ( sws1 and sws2 ), one middle wavelength-sensitive ( rh2 ) and one long wavelength-sensitive ( lws ) cone opsin subfamilies [ 5 ]. (royalsocietypublishing.org)
  • subunits
  • Selecting the opsin with the best balance of activity and selectivity for a given application requires knowing their ability to couple to a full range of relevant Gα subunits. (biomedcentral.com)
  • absorb
  • Opsins absorb light particles to be transmitted as the electrical signals the brain uses to construct images. (luv2s.com)
  • Abstract
  • Individual variation in rod absorbance spectra correlated with opsin gene polymorphism in sand goby (Pomatoschistus minutus) [Abstract]. (arvojournals.org)
  • detectable
  • However, hybridization of a radiolabeled probe to the Southern (DNA) blot of this gel indicated a residual expression of this transcript (D). UV cone opsin mRNA was also reduced in the transgenic eye, although this transcript remained detectable by both Northern blot (B) and RT-PCR (E) techniques. (sciencemag.org)
  • absorption
  • It is likely, therefore, that the pressures experienced at depth will affect opsin structure and may, thereby, affect visual pigment absorption characteristics, particularly the wavelength of maximum absorbance (λ max) . (biologists.org)
  • sequence
  • The variation of the Baltic lmax values was significant (506-511 nm), but it correlated well with the opsin sequence substitutions. (arvojournals.org)
  • characteristics
  • We show that these features reflect structural changes in retinal association domains of helices 3 and 5 but, interestingly, not at either of the two residues known to define these characteristics in cone opsins. (ox.ac.uk)
  • visual
  • Recordings from Arr1 −/− , Arr4 −/− double-knockout mice establish a requirement for at least one of the two visual arrestins for normal cone opsin inactivation at all flash intensities. (pubmedcentralcanada.ca)
  • experiments
  • For example, Gi, Gt, and Go are closely related, but their distinct guanisine triphosphate (GTP) binding properties necessitate using different conditions for experiments with purified opsin in vitro, making it impossible to compare their opsin coupling activity directly [ 14 ]. (biomedcentral.com)