Abstract
The purely aqueous system of phospholipase D (PLD)-mediated transphosphatidylation using pre-existing carriers for the adsorption of phosphatidylcholine (PC) to act as an "artificial interface" was introduced to replace the liquid-liquid system. Toxic organic solvents are avoided during the reaction, and the free enzyme can be simply reused by centrifugation. Special attention has been paid to the effect of the pore diameter and surface area of silica gel 60H covered with PC molecules on the yield of phosphatidylserine (PS). Results indicated that the highest PS yield of 99.5% was achieved. Moreover, 73.6% of the yield of PS was obtained after being used for six batches. This is the first description of the remarkably high reusability of free enzymes for enzymatic synthesis of PS as well. The excellent results make the aqueous-solid system more promising candidates for the industrial production of PS.
Published Version
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