Animal cryptochromes can be photoreceptive
(PCRY), providing direct light input into the circadian clock, or nonphotoreceptive (NPCRY), possibly acting as transcriptional repressors of clock genes.
Foulkes, "Isolation and characterization of melanopsin and pinopsin expression within photoreceptive
sites of reptiles," Naturwissenschaften, vol.
These cells (known as "intrinsically photoreceptive
retinal ganglion cells") send information about light intensity to the brain centers that are responsible for coordinating circadian rhythms to patterns of light and dark.
"I suffer with an incurable eye condition--retinitis pigmentosa--which, as you know, is a breakdown of the photoreceptive
If the trajectory of technology is one in which ever-higher definition leads to a world of increasingly zombified representation--where grids of tinier and tinier pixels diverge increasingly from our own eyes' photoreceptive
structure--then Atkins's art asks what kind of site the living (looking, thinking, feeling) body might now be.
It is based on the discovery that the brain itself is just as sensitive to daylight as the eyes, with 'photoreceptive
' parts using it to help set our biological clocks.
Its relatively large size and simple architecture offer the opportunity to study the process of the acquisition of photoreceptive
function during development.
In such conditions , plants emply photoreceptive
mechanisms to deal with excess light absorbed by chlrophyll .Two key mechanisms operates: one Xanthophyll cycle-dependent thermal energy dissipation of excess light within the light-harvesting complexes; and second leaf antioxidants enzymes and metabolites which scavanges free radicals and dangerous ROS that are produced in excess stressesand in the presence of excess light.(Verhoeven et al.
(PDE enzymes encompass 11 classes.) The PDE-6 class of enzymes are found in the photoreceptive
cells (i.e., rods and cones) of the retina and interact with cGMP in the retina.
It functions on a photoreceptive
basis, causing different levels of melatonin production depending on light intensity.
More specifically, melanopsin is found in a subtype of intrinsically photoreceptive
retinal ganglion cells (ipRGCs) (Berson et al.
The research reveals that the gene called melanopsin causes nerve cells to become photoreceptive