title: The role of mass transport limitation and surface heterogeneity in the biophysical characterization of macromolecular binding processes by SPR biosensing.
abstract: This chapter presents an introduction to the kinetic analysis of SPR biosensor data for the determination of affinity and kinetic rate constants of biomolecular interactions between an immobilized and a soluble binding partner. The need to be aware of and critically test the assumptions underlying the analysis models is emphasized and the consequences for the experimental design are discussed. The two most common sources of deviation in SPR surface binding kinetics from the ideal pseudo-first-order binding kinetics of bimolecular reactions are mass transport limitations and the heterogeneity of the surface sites. These problems are intrinsic to the use of a biosensor surface for characterizing interactions. The effect of these factors on the observed binding kinetics, and strategies to account for them are reviewed, both in the context of mathematical data analysis, as well as the design of the experiments and controls.
authors.affiliation: Dynamics of Macromolecular Assembly, Laboratory of Bioengineering and Physical Science, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health, Bethesda, MD, USA.
authors.forename: Peter
authors.initials: P
authors.lastname: Schuck
authors.forename: Huaying
authors.initials: H
authors.lastname: Zhao
mesh_terms: D016477:Artifacts; D055592:Biophysical Phenomena; D006801:Humans; D007700:Kinetics; D046911:Macromolecular Substances / Q000032:analysis* / Q000737:chemistry / Q000378:metabolism*; D020349:Surface Plasmon Resonance / Q000379:methods*; D013499:Surface Properties
chemical_list: D046911:Macromolecular Substances