Influence of heavy metals (Zinc, Copper) on the activity dynamics of the chyme proteinases in the fish intestine at exposure in water
It was shown that zinc and copper affect the activity and activity dynamics of proteinases at exposure of the fish (roach and perch) chime in water. Species differences were revealed in sensitivity of trypsinlike (caseinlytic), and chymetrypsinlike (hemoglobinelytic) proteinases to the metals under investigation. As primordially zinc ions suppresses the proteinases activity and in the course of exposure of fish chyme in water containing those ions the level of enzymatic activity increases in a number of cases to a greater extent than in the control group, a suggestion was made that they induce the synthesis of proteinases in fish enteral microbiota.