PHOTOCHEMISTRY AND SPECTROSCOPY OF A 5-CHLOROPHYLL REACTION-CENTER OF PHOTOSYSTEM-II ISOLATED BY USING A CU AFFINITY COLUMN - VACHA, F; JOSEPH, DM; DURRANT, JR; TELFER, A; KLUG, DR; PORTER, G; BARBER, J (PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 1995)