p.Y72N/Y124Q/W286A/F295L/F297W/Y337A Tyr72Asn/Tyr124Gln/Trp286Ala/Phe295Leu/Phe297Val/Tyr337Ala (p.Y103N/Y155Q/W317A/F326L/F328W/Y368A Tyr103Asn/Tyr155Gln/Trp317Ala/Phe326Leu/Phe328Val/Tyr368Ala in primary sequence with 31 amino-acids signal peptide) Acyl specificity; replacement of aromatic active center residues in human-ACHE by the corresponding residues in human-BCHE