Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2002-1-24
pubmed:abstractText
Rhodopsin-mediated photoreceptor currents, I(P), of the unicellular alga Chlamydomonas reinhardtii were studied under neutral and acidic conditions. We characterized the kinetically overlapping components of the first, flash-induced inward current recorded from the eye, I(P1), as a low- and high-intensity component, I(P1a) and I(P1b), respectively. They peak between 1 and 10 ms after the light-flash and are both likely to be carried by Ca(2+). I(P1a) and I(P1b) exhibit half-maximal photon flux densities, Q(1/2), of approximately 0.14 and 58 microE m(-2), and maximal amplitudes of approximately 4.9 and 38 pA, respectively. At acidic extracellular pH values (pH 3-5), both I(P1) currents are followed by distinct H(+) currents, I(P2a) and I(P2b), with maxima after approximately 5 and 100 ms, respectively. Because the Q(1/2) values of I(P1b) and I(P2b) virtually coincide with Q(1/2) of rhodopsin bleaching, we suggest that the respective conductances G(1b) and G(2b) are closely coupled to the rhodopsin, whereas the low light-saturating conductances G(1a) and G(2a) reflect transducer-activated states of a second rhodopsin photoreceptor system.
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/11806916-10049347, http://linkedlifedata.com/resource/pubmed/commentcorrection/11806916-10219570, http://linkedlifedata.com/resource/pubmed/commentcorrection/11806916-11606300, http://linkedlifedata.com/resource/pubmed/commentcorrection/11806916-1777569, http://linkedlifedata.com/resource/pubmed/commentcorrection/11806916-1872847, http://linkedlifedata.com/resource/pubmed/commentcorrection/11806916-19431753, http://linkedlifedata.com/resource/pubmed/commentcorrection/11806916-19431775, http://linkedlifedata.com/resource/pubmed/commentcorrection/11806916-19431816, http://linkedlifedata.com/resource/pubmed/commentcorrection/11806916-2015225, http://linkedlifedata.com/resource/pubmed/commentcorrection/11806916-4805005, http://linkedlifedata.com/resource/pubmed/commentcorrection/11806916-628427, http://linkedlifedata.com/resource/pubmed/commentcorrection/11806916-7010112, http://linkedlifedata.com/resource/pubmed/commentcorrection/11806916-8075341, http://linkedlifedata.com/resource/pubmed/commentcorrection/11806916-8195293, http://linkedlifedata.com/resource/pubmed/commentcorrection/11806916-8789109, http://linkedlifedata.com/resource/pubmed/commentcorrection/11806916-8789110, http://linkedlifedata.com/resource/pubmed/commentcorrection/11806916-9263886, http://linkedlifedata.com/resource/pubmed/commentcorrection/11806916-9284306
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0006-3495
pubmed:author
pubmed:issnType
Print
pubmed:volume
82
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
740-51
pubmed:dateRevised
2010-9-14
pubmed:meshHeading
pubmed:year
2002
pubmed:articleTitle
Evidence for a light-induced H(+) conductance in the eye of the green alga Chlamydomonas reinhardtii.
pubmed:affiliation
Institut für Biochemie I, Universität Regensburg, 93040 Regensburg, Germany.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't