Ultraviolet-Induced Sensitivity to Visible Light in Ultraviolet Receptors of Limulus

Ultraviolet-Induced Sensitivity to Visible Light in Ultraviolet Receptors of Limulus

In the UV-sensitive photoreceptors of the median ocellus (UV cells), prolonged depolarizing afterpotentials are seen following a bright UV stimulus. These afterpotentials are abolished by long-wavelength light. During a bright UV stimulus, long-wavelength light elicits a sustained negative-going re...

Full description

Bibliographic Details
Main Authors: Nolte, John, Brown, Joel E.
Format: Online
Language:English
Published: The Rockefeller University Press 1972
Online Access:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2203174/
id pubmed-2203174
recordtype oai_dc
spelling pubmed-22031742008-04-23 Ultraviolet-Induced Sensitivity to Visible Light in Ultraviolet Receptors of Limulus Nolte, John Brown, Joel E. Article In the UV-sensitive photoreceptors of the median ocellus (UV cells), prolonged depolarizing afterpotentials are seen following a bright UV stimulus. These afterpotentials are abolished by long-wavelength light. During a bright UV stimulus, long-wavelength light elicits a sustained negative-going response. These responses to long-wavelength light are called repolarizing responses. The spectral sensitivity curve for the repolarizing responses peaks at 480 nm; it is the only spectral sensitivity curve for a median ocellus electrical response known to peak at 480 nm. The reversal potentials of the repolarizing response and the depolarizing receptor potential are the same, and change in the same way when the external sodium ion concentration is reduced. We propose that the generation of repolarizing responses involves a thermally stable intermediate of the UV-sensitive photopigment of UV cells. The Rockefeller University Press 1972-02-01 /pmc/articles/PMC2203174/ /pubmed/5058474 Text en Copyright © 1972 by The Rockefeller University Press This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 4.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/4.0/).
repository_type Open Access Journal
institution_category Foreign Institution
institution US National Center for Biotechnology Information
building NCBI PubMed
collection Online Access
language English
format Online
author Nolte, John
Brown, Joel E.
spellingShingle Nolte, John
Brown, Joel E.
Ultraviolet-Induced Sensitivity to Visible Light in Ultraviolet Receptors of Limulus
author_facet Nolte, John
Brown, Joel E.
author_sort Nolte, John
title Ultraviolet-Induced Sensitivity to Visible Light in Ultraviolet Receptors of Limulus
title_short Ultraviolet-Induced Sensitivity to Visible Light in Ultraviolet Receptors of Limulus
title_full Ultraviolet-Induced Sensitivity to Visible Light in Ultraviolet Receptors of Limulus
title_fullStr Ultraviolet-Induced Sensitivity to Visible Light in Ultraviolet Receptors of Limulus
title_full_unstemmed Ultraviolet-Induced Sensitivity to Visible Light in Ultraviolet Receptors of Limulus
title_sort ultraviolet-induced sensitivity to visible light in ultraviolet receptors of limulus
description In the UV-sensitive photoreceptors of the median ocellus (UV cells), prolonged depolarizing afterpotentials are seen following a bright UV stimulus. These afterpotentials are abolished by long-wavelength light. During a bright UV stimulus, long-wavelength light elicits a sustained negative-going response. These responses to long-wavelength light are called repolarizing responses. The spectral sensitivity curve for the repolarizing responses peaks at 480 nm; it is the only spectral sensitivity curve for a median ocellus electrical response known to peak at 480 nm. The reversal potentials of the repolarizing response and the depolarizing receptor potential are the same, and change in the same way when the external sodium ion concentration is reduced. We propose that the generation of repolarizing responses involves a thermally stable intermediate of the UV-sensitive photopigment of UV cells.
publisher The Rockefeller University Press
publishDate 1972
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2203174/
_version_ 1611433389417562112

Similar Items