Home
Resources
Material
MCQ's Bank
Lab Simulation
Slide Spotting
Flashcards
Books Library
Pharmacopedia
Calculation Tools
Blog
About Us
Sign In
Sign Up
Drug‑Receptor Binding Affinity Tool
Kd, Ki, IC50 & receptor occupancy
Binding Parameters
Kd (nM)
Ki (nM)
IC50 (nM)
Ligand [L] (nM)
Receptor [R] (nM)
Example Drugs
Fentanyl
Kd 0.1 nM
Propranolol
Kd 1.0 nM
Aspirin
Kd 100 nM
Warfarin
Kd 1000 nM
Penicillin
Kd 10000 nM
Calculate Affinity
Cheng‑Prusoff
Ki = IC₅₀ / (1 + [L]/Kd)