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Photoreceptor cells in the Xenopus retina
Microscopy Research and Technique, 2000This review summarizes our present state of knowledge about spectrally different photoreceptor cell types in the Xenopus retina. The classification of the photoreceptors was based on morphology, combined with immunolabelling with various anti-visual pigment antibodies and other molecular probes on semithin sections and retinal wholemounts. The majority
Röhlich Pál, Szél Ágoston
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Photoreceptor cells and eyes in Annelida
Arthropod Structure & Development, 2006The evolution of photoreceptor cells and eyes in Metazoa is far from being resolved, although recent developmental and morphological studies provided strong evidence for a common origin of photoreceptor cells and existence of sister cell types in early metazoans.
Günter, Purschke +3 more
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1984
Insect photoreceptor cells are usually slender, cylindrical, and aggregated into various species-specific combinations beneath the corneal lens of a compound eye, ocellus, or larval stemmata. Individual cells are so sensitive to light that some are able to signal catches of a single photon (e.g., Lillywhite, 1977). This exquisite sensitivity is founded
Stanley D. Carlson +2 more
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Insect photoreceptor cells are usually slender, cylindrical, and aggregated into various species-specific combinations beneath the corneal lens of a compound eye, ocellus, or larval stemmata. Individual cells are so sensitive to light that some are able to signal catches of a single photon (e.g., Lillywhite, 1977). This exquisite sensitivity is founded
Stanley D. Carlson +2 more
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Recoverin negative photoreceptor cells
Journal of Neuroscience Research, 2000Recoverin, a calcium-binding protein, is unique with respect to its cellular regulation. It is present in retinal rods, cones, cone bipolar cells, and in a rare population of cells in the ganglion cell layer. Inappropriate turn-on or turn-off of recoverin expression has been reported both in small cell lung carcinoma cells from patients with cancer ...
W, Cao, W, Chen, R, Elias, J F, McGinnis
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Fluorescence of Photoreceptor Cells Observed in Vivo
Science, 1981Most rhabdomeres in the eye of the fly ( Musca domestica ) are fluorescent. One kind of fluorescent emission emanates from a photoproduct of the visual pigment, other kinds may be ascribed to photostable pigments.
Franceschini, N. +2 more
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Lamprey ganglion cells contact photoreceptor cells
Neuroscience Letters, 1998Lamprey retinal ganglion cells are localized in two separate layers: those close to the vitreous and those at the junction between the inner nuclear and inner plexiform layers, including some others in the inner nuclear layer, close to the photoreceptor cell layer.
J P, Rio +4 more
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FUNCTIONAL ROLE OF CALCIUM IN PHOTORECEPTOR CELLS
Photochemistry and Photobiology, 1980Abstract— Ca‐uptake by disc membranes prepared from frog rod photoreceptor outer segments was examined. Ca‐uptake study revealed two affinity sites which were saturated with 10–5M and 10–3M of ATP. When disc membranes in 20 mM Tris‐HCl buffer (pH 7.5) were stored at ‐20°C for 6 h, more than 95% of Ca‐uptake activity was lost.
N, Miki +3 more
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An electrical model of the vertebrate photoreceptor cell
Vision Research, 1967Abstract An electrical model of the vertebrate photoreceptor cell is presented which accounts for the similar configuration and polarity of the intracellularty recorded photoreceptor potential (IPP) and the P III component of the electroretinogram. It is proposed that during illumination the outer segment actively hyperpolarizes causing current to ...
A, Bortoff, A L, Norton
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The Biochemistry of Photoreceptor Cells
1981Photoreceptor cells have high rates of metabolism, and enzyme distributions suggest considerable substrate movement. We have used tracer techniques to study the effects of light on photoreceptor metabolism. In vitro, glutamine is metabolized alongside glucose by rat photoreceptors, and is, potentially, a major precursor of the neuroactive amino acids ...
M. J. Voaden +2 more
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Stimulated drug uptake in a photoreceptor cell
Neuroscience Letters, 1984In many cells, organelle translocation requires structural integrity of microtubules [2,6,11,14, 5]. We have found that extracellular application of the antimicrotubular drug colchicine, which was expected to enter cells simply by diffusion, was ineffective at blocking pigment granule migration (PGM) inside fly photoreceptors.
M, Wilcox, N, Franceschini
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