Results 311 to 320 of about 107,639 (354)

FUNCTIONAL ROLE OF CALCIUM IN PHOTORECEPTOR CELLS

Photochemistry and Photobiology, 1980
Abstract— 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, C H, Kuo, Y, Hayashi, M, Akiyama   +3 more
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The Biochemistry of Photoreceptor Cells

1981
Photoreceptor 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, J. Marshall, A. C. I. Oraedu   +2 more
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Cell Fate Determination of Photoreceptor Cells

2014
Rods and cones are highly related, sharing many morphological and functional features. Early lineage studies showed that they are produced by mitotic retinal progenitor cells (RPCs) that produce not only photoreceptor cells, but other retinal cell types as well, even in a terminal division (Holt et al., Neuron 1(1):15–26, 1988; Turner and Cepko, Nature
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[Signal transduction in photoreceptor cells].

Die Naturwissenschaften, 1998
Vertebrate photoreceptors respond to light with a brief hyperpolarization of their membrane potential. In the dark, photoreceptors are depolarized by cation influx through channels in the plasma membrane which are kept open by the second messenger cGMP. Light absorption activates an enzyme cascade that hydrolytically destroys cGMP, resulting in channel
F, Müller, U B, Kaupp
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Photoreceptor Cells

2023
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[100] Renewal of photoreceptor cells

1982
Publisher Summary This chapter discusses the renewal of photoreceptor cells. Renewal of light-sensitive membranes and their intrinsic visual pigments is a universal feature of visual photoreceptors. This process has been described in vertebrate photoreceptors, but the fundamental events are probably similar in vertebrates and invertebrates.
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Photoreceptor laminin drives differentiation of human pluripotent stem cells to photoreceptor progenitors that partially restore retina function

Molecular Therapy, 2023
Hwee Goon Tay, Swarnaseetha Adusumalli, Wei Sheng Tan   +2 more
exaly  

Photoreceptor Cells

Retina, 1994
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Optical guiding by photoreceptor cells.

Federation proceedings, 1976
The potential for any morphological part of a photoreceptor cell to function as an optical waveguide is determined 1) by the dimensionless parameter V as shown by Snyder (IEEE Trans., Microwave Theory Tech. 17: 1133, 1969) and by Snyder, Pask and Mitchell (J. Opt. Soc. Am.
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How Photoreceptor Cells Respond to Light

Scientific American, 1987
J L, Schnapf, D A, Baylor
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