We describe a practical method to produce pure enantiomers of non-prot
einogenic alpha-amino acids by pronase-catalyzed hydrolysis of their m
ethyl esters. Each of the two pure enantiomers was obtained in high yi
eld, while the reaction conditions were optimized with a view to large
scale production. Part of this work was devoted to conceiving an anal
ytical procedure especially designed to monitor the steric course of e
nzymatic reactions. (C) 1994 Wiley-Liss, Inc.