A drug resembling the substrate transition state binds its t

A drug resembling the substrate transition state binds its target enzyme with Kd = 4.2 nM. If the drug concentration in a patients serum is 7.6 nM one hour after administration, by what factor has the enzyme activity changed?

Solution

The factor by which the enzyme activity changed = 7.6nM/4.2nM

= 1.81

Therefore, the factor by which it has changed is 1.81