FDMR SPECTROSCOPY OF PERIDININ CHLOROPHYLL-A PROTEIN FROM AMPHIDINIUM-CARTERAE

Authors
CARBONERA D GIACOMETTI G AGOSTINI G
Citation
D. Carbonera et al., FDMR SPECTROSCOPY OF PERIDININ CHLOROPHYLL-A PROTEIN FROM AMPHIDINIUM-CARTERAE, SPECT ACT A, 51(1), 1995, pp. 115-123
Citations number
19
Categorie Soggetti
Spectroscopy
Journal title
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY → ACNP
ISSN journal
13861425
Volume
51
Issue
1
Year of publication
1995
Pages
115 - 123
Database
ISI
SICI code
1386-1425(1995)51:1<115:FSOPCP>2.0.ZU;2-R
Abstract
Fluorescence detected magnetic resonance (FDMR) is used to investigate peridinin-chlorophyll-a protein (PCP), the peripheral antenna of the photosystem of Amphidinium carterae. Peridinin triplet resonances are obtained monitoring chlorophyll-a fluorescence in agreement with effic ient energy transfer between the two pigments. Two sites are revealed for peridinin having slightly different triplet energy (about 190 cm-1 ), and D values averaging 0.045 cm-1. Spin exchange occurs between the two sites at a rate of about 5 x 10(7) exp(-67/T) s-1.