One reason for the popularity of the dissociation constant in biochemistry and pharmacology is that in the frequently encountered case where x=y=1, Kd has a simple physical interpretation: when = K d {\displaystyle =K_{d}} , = {\displaystyle =} or equivalently + = 1 2 {\displaystyle {\tfrac {}{{}+}}={\tfrac {1}{2}}} .
Unha razón do amplo uso da constante de disociación en bioquímica e farmacoloxía é que no caso frecuente no que x=y=1, Kd ten unha interpretación física simple: cando = K d {\displaystyle =K_{d}} , = {\displaystyle =} ou equivalentemente + = 1 2 {\displaystyle {\tfrac {}{{}+}}={\tfrac {1}{2}}} .