Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 8 of 8 for “"SWS1"”.
-
Molecular Evolution and Functional Characterization of the Visual Pigment Proteins of the Great Bowerbird (Chlamydera nuchalis) and Other Vertebrates
… pigment types, the short-wavelength-sensitive (SWS1) pigments have garnered particular interest due to the broad spectral range among vertebrates and the importance of UV signals in communication. Chapter 2 investigates the evolutionary history of SWS1 in vertebrates with a view toward its …
-
Visual Opsin Diversity in Anurans
… Amino acid sequences of the genes RH1, LWS, SWS1, and SWS2 were compared across taxa to identify variable sites, as such variation can shift the spectral sensitivity of visual pigments and thus alter dim-light and color vision. Some of the amino acid changes observed are known to tune …
-
Evolution and functional specializations in nocturnal environments: insights from visual pigments in Chiroptera
… pressure in cone opsin genes, Lws and Sws1. I find significant evidence that long-term shifts in selection constraint in cone opsins occur in response to ecological factors underlying reliance on visual information and exposure to varying light environments. In Chapters 4 and 5, I focus …
-
The Effect of Gonadotropin Releasing Hormone on Opsin Gene Expression and Spectral Sensitivity in Zebra Cichlid Fish (Metriaclima zebra).
… opsin genes previously described in cichlids (SWS1, SWS2b, RH2b, RH2aβ, and RH2aα). Although differences in the spectral sensitivity between control and GnRH-treated fish were not evident on a functional level, there were changes in the gonadosomatic index in the intubation group. Quantitative …
-
Cichlids as a model for the evolution of visual sensitivity
… tuning sites, only the ultraviolet sensitive SWS1 class have patterns of substitution that are consistent with photic environment-driven evolution. In Chapter 2, I determine the peak absorbances of in vitro expressed pigments for all seven Nile tilapia cone opsin genes and chart opsin …
-
Structural, molecular and functional characterisation of visual photoreceptors and opsins in sole: an ontogenetic, chronobiological and environmental approach
… sensibles a longitudes de onda corta (Sws1 y Sws2), longitudes de onda media (Rh2.3 y Rh2. 4) y longitudes de onda larga (Lws), en especímenes de lenguado mantenidos en ciclos de luz-oscuridad con luz blanca (LDW), azul (LDB), roja (LDR) y en condiciones de luz blanca constante (LL), …
-
The maintenance of variation in Cyprinodontiformes
… and dusk. LWS, RH2-1, RH2-2, and SWS2B (but not SWS1 or SWS2A) opsin gene expression was lowest at midnight and dawn and highest at midday and dusk, and the observed temporal shifts were many times larger than an accompanying difference in production of opsins in tannin-stained versus clear water …
-
Development of fish embryonic stem cell lines as tools for basic and applied studies of interest in aquaculture
… that SAEC-H7 cells express five visual opsins (sws1, sws2a, sws2b, rh2.4 and lws) and eleven non-visual opsins (opn3, opn4m1, opn4m2, opn4m3, opn5, opn6a, opn7a, tmt1a, tmt1b, tmt2a and tmt2b), ensuring sensitivity to all the wavelengths present in white light, but also beyond the visual …