What is the dissociation constant, K d , of a ligand with a percent occupancy, or fractional saturation, of 30 % when [ligand] = 10 − 7 M ?

Answer : The value of dissociation constant is,

Explanation :

Formula used :

where,

= percent occupancy = 30 % = 0.3

[A] = consecration of unbound ligands =

= dissociation constant = ?

Now put all the given values in the above formula, we get:

Thus, the value of dissociation constant is,

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