STUDY OF FLUORESCENCE FROM ISOLATED YEAST PLASMA-MEMBRANES IN VISIBLERANGE OF THE SPECTRUM

The fluorescence with maximum at 683 nm from isolated yeast plasma mem branes has been detected. The fluorescence was due to a membrane-bound compound absorbing in the visible range of the spectrum. The fluoresc ence excitation spectrum of this compound has a structure typical for porphyrins. At the same time, in several fluorescence properties the p orphyrin localized in the plasma membrane is different. from other int racellular porphyrins (protoporphyrin, coproporphyrin).