Why rods and cones?
نویسندگان
چکیده
منابع مشابه
Why are rods more sensitive than cones?
One hundred and fifty years ago Max Schultze first proposed the duplex theory of vision, that vertebrate eyes have two types of photoreceptor cells with differing sensitivity: rods for dim light and cones for bright light and colour detection. We now know that this division is fundamental not only to the photoreceptors themselves but to the whole of retinal and visual processing. But why are ro...
متن کاملRods Are Rods and Cones Cones, and (Never) the Twain Shall Meet
More than 100 photopigment G protein-coupled receptors (opsins) have been sequenced and organized into six classes. Rod photoreceptors in various species have been found to express an opsin from one of the two rhodopsin classes, while cones express an opsin from one of the four remaining classes. It has now been discovered that salamander short-wavelength sensitive cones and green rods express ...
متن کاملEpigenomic landscapes of retinal rods and cones
Rod and cone photoreceptors are highly similar in many respects but they have important functional and molecular differences. Here, we investigate genome-wide patterns of DNA methylation and chromatin accessibility in mouse rods and cones and correlate differences in these features with gene expression, histone marks, transcription factor binding, and DNA sequence motifs. Loss of NR2E3 in rods ...
متن کاملRods Feed Cones to Keep them Alive
Cone photoreceptors, responsible for high-resolution and color vision, progressively degenerate following the death of rod photoreceptors in the blinding disease retinitis pigmentosa. Aït-Ali et al. describe a molecular mechanism by which RdCVF, a factor normally released by rods, controls glucose entry into cones, enhancing their survival.
متن کاملEarly Receptor Potentials of Rods and Cones in Rodents
I N T R O D U C T I O N T h e possibility t h a t t h e ear ly recep to r po ten t ia l m a y b e closely l inked to the init ial events in t h e pho toexc i t a t ion of ve r t eb ra t e visual receptors has p r o m p t e d intensive studies of t h e proper t ies of this response (1-5) . M o s t of these studies h a v e been p e r f o r m e d e i ther o n mixed (rod a n d cone) eyes ( 1 , 3 , ...
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ژورنال
عنوان ژورنال: Eye
سال: 2015
ISSN: 0950-222X,1476-5454
DOI: 10.1038/eye.2015.236