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 ?
Colour vision in vertebrates is usually achieved through the interaction of various photopigments in the cone cells found in the retina.
Vertebrate and spider peropsins are bistable photopigments that, in the dark, bind all-trans retinal, which is converted to 11-cis retinal by light (Nagata et al., 2010).
Melanopsin: A novel photopigment involved in the photoentrainment of the brain's biological clock?
In the future, we will not only be talking about simple lux and lumens anymore, but also about "melanopic illuminance." The terms, 'mlux' and 'melanopic' lumens, where 'm' stands for the photopigment melanopsin, define the amount of light required to activate mela-nopsin in humans, which in turn, contributes towards the balance of our circadian rhythm.
The spectral response of each kind of cone is defined by the specific type of photopigment it contains.
The researchers suspected that opsintriggered photopigments mediated the color change, and Provencio cloned a new photopigment dubbed "melanopsin" from the frog skin cells.
* Chlorophyll diagnostic photopigment analysis is valuable for identifying and quantifying phytoplankton functional groups.
In the vertebrate neural retina, light sensitivity is multi-factorial and depends on the properties of photopigment molecules, their synthesis and incorporation into photoreceptor membranes and the neuronal circuitry between photoreceptor, bipolar and ganglion neurons.
In contrast, exposure to bright light significantly reduced retinal light sensitivity of Pacific halibut, predominately by affecting the photopigment which absorbs the green wavelengths of light (-520-580 nm) most strongly.
photopigment indicators can be routinely incorporated in waterquality
One of the deer's cone pigments is similar in sensitivity to the photopigment in the human eye that peaks in the blue wavelength, and the ether has a peak sensitivity to the wavelength that we see as yellow.
|1979~: 'Opponent Chromatic Mechanisms: Relation to Photopigment and Hue Naming', Journal of the Optical Society of America, 69, pp.