binding constant 10/6/11 BP: The distinction between binding datum and binding constant is based on the later being part of an equation. That should be captured in the logical definition here, and used to make it to a defined class. A binding datum about the disposition of two or more material entities to form complexes which comes in the form of a scalar and unit that are utilized in equations that model the binding process PERSON: Bjoern Peters, Randi Vita, Jason Greenbaum The predicted or measured binding affinity of a peptide to a MHC molecule can be captured in the binding constants "IC50 = 12 nM" or "t 1/2 = 30 minutes". binding constant binding datum equilibrium dissociation constant (KD) equilibrium association constant (KA) equilibrium dissociation constant (KD) approximated by IC50 equilibrium dissociation constant (KD) approximated by EC50 half life of binding datum binding off rate measurement datum (koff) binding on rate measurement datum (kon) metadata incomplete