visual pigment


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visual pigment

A light-absorbing compound in the photoreceptor cells of the retina that converts light energy into a nerve impulse that is passed from the receptor cells to the optic nerve.
See also: pigment
References in periodicals archive ?
Biochemistry of visual pigment regeneration: The Friedenwald lecture.
LpOps5 is clearly a functional visual pigment that is present at a sufficiently high concentration in rhabdoms to impact the photoresponse.
The molecular mechanism that differentiates wavelengths related to color perception in the visual system depends on the presence of specific proteins that form the visual pigments (Trezise & Collin, 2005).
together with colleagues at the University of Frankfurt and universities in Vienna, have now been able to show that in mature cones of mice and rats the production of visual pigment is regulated by thyroid hormone.
The visual pigment is found in the outer segments of the photoreceptors.
argus eyes contain two spectral classes, with visual pigment in the cells of the main rhabdom (R1-7) absorbing maximally at 510 nm and pigment in the eighth retinular cells (R8) at 370 nm (Cummins et al.
In this way, the RPE cell phagocytoses the discs of broken down visual pigment within the outer segments.
Szuts was looking for a visual pigment known as rhodopsin, which is the light-sensing molecule in all known types of eyes.
The UV light might be absorbed both by the shorter wavelength peak ([beta]-band) of the yellow-absorbing visual pigment in the yellow cell and by the main peak ([alpha]-band) of the UV-absorbing visual pigment in the UV cell.
The researchers think this will allow them to capture changes in such molecules as hemoglobin as it binds to oxygen or the visual pigment rhodopsin when it is struck by light.