photopigment

(redirected from photopigments)
Also found in: Dictionary, Thesaurus, Medical.

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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
"This makes the darkness-dwelling silver spinyfin the vertebrate with the most photopigment genes by far," explains Salzburger.
The arthropsins have been proposed to function in olfaction (Schumann and Mayer, 2016); however, recent evidence suggests they can also form a photopigment. The opsin responsible for producing diapause in Daphnia magna was recently identified (Roulin et al., 2016), and a phylogenetic analysis of this opsin places it among the arthropsins (B.-A.
(8) Tetartan designs were included to identify abnormality of a supposed fourth yellow sensitive photopigment but are not needed.
The spectral response of each kind of cone is defined by the specific type of photopigment it contains.
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.
* Chlorophyll diagnostic photopigment analysis is valuable for identifying and quantifying phytoplankton functional groups.
(1993) were fitted to the normalized spectral sensitivity data assuming the presence of two visual photopigments. Unknown model parameters (photopigment absorption maxima and their weighting proportions) were estimated by using maximum likelihood within the software package R (vers.
After setting out the evolutionary, ecological, and developmental constraints of the system, they wander through it as the visual information would do, staring in the photopigments and ending at the cortex and in visual perception.
Spectral sensitivity of color-blind observers and the cone photopigments. Vision Research, 12, 2059-2071.
In the March 11 NATURE, they describe shrimp with chalky-white eyes, indicating degraded photopigments, at two fields of hydrothermal vents on the Atlantic seabed.
The surface film was then removed by scrubbing, suspended in acetone, and photopigments extracted and analyzed spectrophotometrically (Hill and Hawkins 1990).
Colonies in well-lit habitats are brown due to high densities of endosymbiotic zooxanthellae containing abundant photopigments, while those in dark habitats are white, indicating low levels of photopigments (Miller 1995).