Abstract
The effect of chlorophyll a, its decomposition products and the metal derivatives on the activity of trypsin was studied and the following results were obtained.
The chlorophyll a and the chlorophyllin, an alkaline decomposition product of chlorophyll, inactivated the enzyme, while the pheophytin, an acid decomposition product of chlorophyll, had no influence on the activity of enzyme.
The action of chlorophyll on this enzyme was inhibited by the presence of calcium ion.
The changes in the fluorescence spectra of the enzyme (the quenching of the fluorescence) occured after the incubation of this with Cu-chlorophyllin and Fe-chlorophyllin.
