biocatalysis Biocatalysis 7 Article 5 chemistry 5 enzyme immobilization 4 Kinetics 3 controlled study 3 enzyme activity 3 enzymology 3 kinetics 3 metabolism 3 nonhuman 3 pH 3 protein expression 3 Catalysis 2 Catalytic Domain 2 Enzyme Stability 2 Pseudomonas putida 2 biocatalyst 2 catalysis 2 chemical reaction 2 enzyme active site 2 enzyme purification 2 enzyme specificity 2 enzyme stability 2 histidine 2 immobilized enzyme 2 polyethyleneimine 2 structure analysis 2 synthesis 2