ELECTRIC LINEAR DICHROISM OF P700 CHLOROPHYLL U-PROTEIN COMPLEXES期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

按检索

ELECTRIC LINEAR DICHROISM OF P700 CHLOROPHYLL U-PROTEIN COMPLEXES

Authors:	A G Gagliano † N E Geacintov ‡ J Breton S Acker R Remy §

Institution:	*Department de Biologie. Centre d'Etudes Nucleaires de Saclay, B.P. No.2;, 91190 Gif sur Yvette, France †UniversitéParis XI, Institut Universitaire de Technologie, Cachan, France;‡Chemistry Department and Radiation and Solid State Laboratory, New York University, New York, NY 10003, U.S.A.;§Laboratoire de Physiologie Cellulaires Vegetate Depandant de I'Universitk de Paris, Associe au C.N.R.S. (LA No. 40). 91405 Orsay Cedex, France

Abstract:	Abstract— The P₇₀₀ chlorophyll a -protein complex (CPI) isolated from green plants was oriented in aqueous solutions using pulsed electric fields of up to 6700 V cm^-1. The electric linear dichroism spectrum is reported in the range of 400–720nm. Positive peaks in the linear dichroism Δ A = A _I - A ₁ (where A_I and A₁ are the absorbance components in which the polarizer orientation is parallel and perpendicular with respect to the electric field. respectively) are observed at 443 and 686 nm. The ΔA signal at 686 nm is discussed in terms of either a specialized chlorophyll form absorbing at 686 nm. or due to an exciton component absorbing at the same wavelength.

Keywords: