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Abstract
Efficient development of enzymatic synthesis in two-phase systems is closely related with appropriate selection of the reaction medium (especially the solvent and phase ratio). A selection procedure based on the calculation of the theoretically allowable conversion and product concentration is presented and applied to a peptide synthesis using papain. For the synthesis of the dipeptide Boc-Gly-Phe-OMe, the operating conditions have been determined, and the two-phase system to be used has been successfully selected (with trichloroethylene being the best solvent).