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BACKGROUNDFour enzymes were immobilized for the production of optically pure natural and non‐natural L‐amino acids via the ‘Double‐Racemase Hydantoinase Process’. Immobilization constitutes an empirical process, and for each enzyme we tested 11 carriers with different functional groups; epoxide, EC‐EP, EC‐HFA, IB‐150 and IB‐350, carboxylic acid IB‐C435, quaternary ammonium IB‐A161, IB‐A171 and IB‐A369,...
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