A method has been presented to evaluate the Ca2+-dependent binding aff
inity of ligands to calmodulin (CaM) from their chromatographic retent
ions obtained on a CaM-Sepharose column. Enantiomers of benzodiazepine
s and related compounds could be separated. Among chiral calcium antag
onists, verapamil showed stereoselectivity of binding. (C) 1995 Wiley-
Liss, Inc.