Abstract
The effect of chlorophyll and its decomposition products on the a-amylase activity was investigated.
The chlorophyll and the chlorophylline which is an alkaline decomposition product of chlorophyll inactivated the enzyme. The pheophytin which is an acid decomposition product of chlorophyll had an effect on the enzyme and magnesium had also an effect. The inhibition of the enzyme with chlorophyll was protected by the presence of calcium. The optical decomposition products of chlorophyll inactivated the enzyme but their inactivating action decreased with the progress of the optical decomposition degree of chlorophyll.
