Amino acid ester synthesis by immobilized α-chymotrypsin
A screening of immobilized α-chymotrypsin preparations suitable for the synthesis of N-acetyl-L-tyrosine ethyl ester from N-acetyl-L-tyrosine and up to 99% ethanol was carried out. α-Chymotrypsin adsorbed to Sepharose LH-20 or covalently bound to Sepharose 4B (tresyl chloride activation) was found to be an efficient catalyst. A column packed with immobilized enzyme retained 60% of its initial acti
