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 quantitative binding datum that is expressed as a scalar number and a unit, which can be utilized in equations that model the binding process independent of the specific assay performed. 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 quantitative binding datum metadata incomplete