photopigment


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photopigment

[¦fōd·ō¦pig·mənt]
(biochemistry)
A pigment that is unstable in the presence of light of appropriate wavelengths, such as the chromophore pigment which combines with opsins to form rhodopsin in the rods and cones of the vertebrate eye.
References in periodicals archive ?
Melanopsin: A novel photopigment involved in the photoentrainment of the brain's biological clock?
Taking a study from last year as their base, Hart and his colleagues isolated and sequenced genes encoding shark photopigments involved in vision.
Color Vision: From Genes to Perception, chapter Opsin genes, cone photopigments, color vision, and color blindness, pages 3-51.
However, he adds, even as activating melanopsin photopigment during the day is believed to be beneficial, it could be bad to activate it at night.
Phytoplankton photopigments as indicators of estuarine and coastal eutrophication.
2]) represents a substantial substrate on which to incorporate photopigment molecules.
The parameters showing the largest effects of bright light exposure were clearly the ratios of the long wave-length to short wavelength photopigment weighting factors that are indicative of the relative value of the two photopigments to the composite curve.
8) Tetartan designs were included to identify abnormality of a supposed fourth yellow sensitive photopigment but are not needed.
His work focuses mostly on melanopsin, a photopigment he had discovered before he joined the Salk Institute.
A recently discovered photopigment, melanopsin, has been localized in the retinas of both rodents and humans (Provencio et al.
Trichromatic vision, often described inappropriately as 'red', 'green'and 'blue', is derived from three cone classes which contain photopigment with relatively long (L), medium (M) and short (S) wavelength spectral sensitivity.
Further analysis showed that retinal photoreceptor cells in the mouse model were most likely dying as a result of a toxic accumulation of the very photopigment, which receives light signals in the eye and is crucial for normal vision.