PRIMARY CHARGE SEPARATION IN PHOTOSYSTEM-I - A 2-STEP ELECTROGENIC CHARGE SEPARATION CONNECTED WITH P700(+)A(0)(-) AND P700(+)A(1)(-) FORMATION

DC FieldValueLanguage
dc.contributor.authorHECKS, B
dc.contributor.authorWULF, K
dc.contributor.authorBRETON, J
dc.contributor.authorLEIBL, W
dc.contributor.authorTRISSL, HW
dc.date.accessioned2021-12-23T16:13:53Z-
dc.date.available2021-12-23T16:13:53Z-
dc.date.issued1994
dc.identifier.issn00062960
dc.identifier.urihttps://osnascholar.ub.uni-osnabrueck.de/handle/unios/10794-
dc.description.abstractA PS I membrane preparation from a PS II deficient mutant of Synechocystis sp. PCC 6803 (psb DI/DII/C-) was investigated by picosecond photovoltage and fluorescence measurements. The photovoltage kinetics show two distinct phases. At low excitation energies the fast phase correlates with the fluorescence decay time constant of 22 /- 4 ps. This phase is ascribed to the trapping of excitons as described by the reaction (Ant(i)P700)(*) A(0) --> Ant(i)P700(+) A(0)(-). In addition to this phase, the photovoltage displays a second rising phase of smaller amplitude with a time constant of 50 /- 15 ps. We assign the latter phase to further electron tranfer from A(0) to the secondary acceptor, A(1). Assuming the protein as a homogeneous dielectric, our results suggest that the transmembrane distance A(0)-A(1) spans only a small part (20 /- 8%) of the distance P700-A(1).
dc.language.isoen
dc.publisherAMER CHEMICAL SOC
dc.relation.ispartofBIOCHEMISTRY
dc.subjectABSORBANCE DIFFERENCE SPECTROSCOPY
dc.subjectBiochemistry & Molecular Biology
dc.subjectENERGY-TRANSFER
dc.subjectEXCITED-STATES
dc.subjectFEMTOSECOND SPECTROSCOPY
dc.subjectFLUORESCENCE DECAY
dc.subjectPARTICLES
dc.subjectPHOTOSYNTHETIC REACTION CENTERS
dc.subjectPICOSECOND TRANSIENT ABSORPTION
dc.subjectRHODOPSEUDOMONAS-VIRIDIS
dc.subjectSYSTEM-I
dc.titlePRIMARY CHARGE SEPARATION IN PHOTOSYSTEM-I - A 2-STEP ELECTROGENIC CHARGE SEPARATION CONNECTED WITH P700(+)A(0)(-) AND P700(+)A(1)(-) FORMATION
dc.typejournal article
dc.identifier.doi10.1021/bi00195a001
dc.identifier.isiISI:A1994NY82000001
dc.description.volume33
dc.description.issue29
dc.description.startpage8619
dc.description.endpage8624
dc.contributor.orcid0000-0002-2313-6643
dc.contributor.researcheridD-7415-2019
dc.publisher.place1155 16TH ST, NW, WASHINGTON, DC 20036 USA
dcterms.isPartOf.abbreviationBiochemistry
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