in contrast , the affinity of the human lymphocyte beta 2-adrenoceptor was approximately 100-fold greater for ( + ) -s-propafenone ( ki , 7.2 +/- 2.9 nm ) than for the ( - ) -r-enantiomer ( ki , 571 +/- 141 nm ) .
C0086418
human
C0001643
beta