0.6×10^6 - 1.0×10^6 M^-1×sec^-1
||Northrup SH, Erickson HP. Kinetics of protein-protein association explained by Brownian dynamics computer simulation. Proc Natl Acad Sci U S A. 1992 Apr 15 89(8):3338-42. p.3338 left column bottom paragraphPubMed ID1565624
|| Nobel, R. W., Reichlin, M. & Gibson, Q. H. (1969) J. Biol. Chem. 244, 2403-2411.PubMed ID4977444
||Primary source  summary: "When an antibody combines with a hemeprotein antigen the fluorescence of the tryptophan residues of the antibody is partially quenched. With fluorescence quenching as an indicator, the stoichiometries and kinetics of the reactions of antihemoglobin A antibodies with various hemoglobins and the reactions of antihuman cytochrome c antibodies with various cytochromes c have been studied."
||p.3338 left column bottom paragraph: "Values of k2 = 0.6-1.0×10^6 have been reported for polyclonal antibodies binding to hemoglobin and cytochrome
c (primary source)." Primary source studied rabbits