Introduction to Recombinant Enzyme Pre-commercialization -- Recombinant Enzyme: Cloning and Expression -- Common Laboratory Procedure -- Characterization of Recombinant Enzymes -- Purification of Recombinant Protein for Industrial Use -- Recombinant Enzyme Fermentation -- Scaling-up Recombinant Enzyme Fermentation -- Downstream Processing of Recombinant Enzymes for Commercialization -- Economic and Environmental Evaluation of Recombinant Enzyme Production -- Case Study: Recombinant Bromelain Selection -- Case Study: Recombinant Bromelain Cloning, Characterization and Upstream Processes -- Case Study: Recombinant Bromelain Downstream Processing.