Abstract: The invention relates to a method for catalysing complex reactions or large molecules, more specifically, to enzyme-catalysed reactions during which undesirable consecutive or subsidiary reactions usually occur; using enzymes which are bonded to a polymer support. According to the invention, undesirable consecutive or subsidiary reactions are to a large extent avoided by selecting a non-porous or almost non-porous support material. In particular, the invention relates to a method for the enzymatic extraction of biomolecules, preferably peptides, proteins, oligosaccharides or polysaccharides from their biologically inactive precursors using enzymes which are bonded to a polymer support, especially a method for extracting insulins or their analogs from the corresponding precursors using enzymes which are bonded to a polymer support.

Abstract: The present invention relates to a process for delaying the deactivation of glutaryl amidase during enzyme catalysis. The enzyme catalyst is, after maximum conversion of the substrate, separated off by filtration and can be reused in a subsequent reaction batch. In each reaction cycle, the enzyme catalyst loses activity. The inactivation of the enzyme catalyst can be delayed by bringing it into contact with a thiol during the reaction.

Abstract: A process is provided for delaying the deactivation of glutaryl amidase during catalysis. The amidase is, after maximum conversion of a substrate, separated off by filtration and can be reused in a subsequent reaction batch. In each reaction cycle, the amidase loses activity. The inactivation of the amidase can be delayed by bringing it into contact with a thiol during the reaction. The thiol is preferably 2-mercaptoethanol or cysteine.