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Individual differences in photopigments
Annual Meeting Optical Society of America, 1986Variations in color vision have long been understood as reflecting variations in the photopigment complement. Beyond those photopigment variations that account for the differences between the classical color vision phenotypes, there are several lines of evidence to suggest further variation in the spectral positioning of photopigments found in ...
Jay Neitz, Gerald H. Jacobs
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The Photopigments in an Insect Retina
1973Colour vision is not an exclusive property of vertebrates. Also insects can discriminate wavelengths. The best known example is the honeybee, as shown by training experiments (1) and electrophysiological recordings (2,3). The peripheral wavelength discrimination is accomplished by at least three receptor types. The spectral sensitivity of the receptors
G. Höglund +4 more
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Insect Photopigments: Photoreceptor Spectral Sensitivities and Visual Adaptations
2014The spectral sensitivity of photoreceptors is primarily determined by the expressed rhodopsins. After a brief introduction to the photochemistry of insect rhodopsins, the relatively simple case of bee visual pigments and photoreceptors is described, followed by the more complicated cases of butterflies and flies.
Arikawa, Kentaro, Stavenga, Doekele G.
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Photopigments and photoentrainment in the Syrian golden hamster
Brain Research, 1997The Syrian golden hamster (Mesocricetus auratus) is an important model in the study of circadian rhythms. However, as in other mammals, little is known about the photoreceptors that mediate circadian entrainment. Using immunocytochemistry and RNA blot hybridization, we found no evidence for the presence of blue-/UV-sensitive opsin.
M, von Schantz +3 more
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Mapping cone photopigment optical density
Journal of the Optical Society of America A, 1993The distribution of cone photopigment across the retina affects the amount of light captured by cones at each retinal location. Cone photopigment optical density is measured in two ways, with reflectometry and/or with color matching. Color matching measures a higher optical density than does reflectometry.
A E, Elsner, S A, Burns, R H, Webb
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Looking at a circadian photopigment
Trends in Neurosciences, 2001The photopigments in the human eye that transduce light for vision are known, but now a group of volunteers has given up several nights of sleep to help researchers better understand how the human eye transduces light for circadian and neuroendocrine effects as well. Each night, the subjects’ pupils were dilated and exposed to a different wavelength of
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Absorption characteristics of oriented photopigments in microvilli
Biological Cybernetics, 1976We have analysed the effects of photopigment orientation in microvilli membranes on the absorption properties of rhabdomeres.
J N, Israelachvili, M, Wilson
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Plant and fungal photopigments
Wiley Interdisciplinary Reviews: Membrane Transport and Signaling, 2012AbstractLight is both an energy source and a carrier of information. Changes in light intensity, direction, quality, spectral composition, and the metronomic predictability of the Earths' light‐dark cycles carry vital information about the environment. Photoreceptors have evolved that sense these characteristics of light and trigger cellular signaling ...
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Photoproducts of retinal photopigments and visual adaptation
Vision Research, 1972Abstract A five-component cyclic model of photopigment kinetics has been used to compute photochemical changes corresponding to experimental studies of rod adaptation in the rat and in man. It is noted that a simple relationship between rhodopsin photoproducts and visual threshold permits a consistent description of rod adaptation with or without a ...
M A, Mainster, T J, White
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Immunocytochemical localization of photopigments in cephalopod retinae
Journal of Neurocytology, 1987The photopigments, rhodopsin and retinochrome, have been localized in cephalopod retinae using light and electron microscopic immunocytochemical methods. Polyclonal antibodies prepared against squid opsin demonstrated the presence of this protein in the photoreceptor rhabdomes, Golgi zone, Golgi-associated vesicles, plasma membrane, large cytoplasmic ...
L J, Robles +4 more
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