title: Use of chemometric methodology in optimizing conditions for competitive binding partial filling affinity capillary electrophoresis.
abstract: This work expands the knowledge of the use of chemometric response surface methodology (RSM) in optimizing conditions for competitive binding partial filling ACE (PFACE). Specifically, RSM in the form of a Box-Behnken design was implemented in flow-through PFACE (FTPFACE) to effectively predict the significance of injection time, voltage, and neutral ligand (neutral arylsulfonamide) concentration, [L(o)], on protein-neutral ligand binding. Statistical analysis results were used to create a model for response surface prediction via contour and surface plots at a given maximum response (DeltaRMTR) to reach a targeted K(b) = 2.50 x 10(6) M(-1). The adequacy of the model was then validated by experimental runs at the optimal predicted solution (injection time = 2.3 min, voltage = 11.6 kV, [L(o)] = 1.4 microM). The achieved results greatly extend the usefulness of chemometrics in ACE and provide a valuable statistical tool for the study of other receptor-ligand combinations.
authors.affiliation: Department of Chemistry and Biochemistry, California State University, Los Angeles, CA, USA.
authors.forename: Ruth E
authors.initials: RE
authors.lastname: Montes
authors.forename: Grady
authors.initials: G
authors.lastname: Hanrahan
authors.forename: Frank A
authors.initials: FA
authors.lastname: Gomez
mesh_terms: D001667:Binding, Competitive; D002208:Caproates / Q000032:analysis; D019075:Electrophoresis, Capillary / Q000379:methods; D008024:Ligands; D008832:Microchemistry / Q000379:methods; D008956:Models, Chemical; D013449:Sulfonamides / Q000737:chemistry; D014050:Toluene / Q000031:analogs & derivatives / Q000737:chemistry; D000096926:Benzenesulfonamides
chemical_list: D002208:Caproates; D008024:Ligands; D013449:Sulfonamides; D014050:Toluene; C533781:(((4-(aminosulfonyl)phenyl)methyl)-amino)-6-oxohexanoic acid; C025417:4-toluenesulfonamide; D000096926:Benzenesulfonamides