title: Multiple peaks in high-performance liquid chromatography of proteins. beta-Lactoglobulins eluted in a hydrophobic interaction chromatography system.
abstract: The chromatographic behavior of beta-lactoglobulins when eluted in hydrophobic interaction chromatography systems is studied. By modifying some factors, such as pH and temperature, the relationship between shape of the chromatographic peak and protein structure is shown. At pH 4.5 and low temperature multiple peaks for beta-LG A and beta-LG B are observed and assigned to aggregates. The effects of other parameters, besides pH and temperature, such as volume and concentration of injected sample, contact time between protein and stationary and/or mobile phases, and nature and concentration of mobile phase upon aggregation are studied. Comparison of the chromatographic behavior of both variants of beta-lactoglobulin is made.
authors.affiliation: Instituto de Quimica Orgánica, (C.S.I.C.), Madrid, Spain.
authors.forename: M
authors.initials: M
authors.lastname: de Frutos
authors.forename: A
authors.initials: A
authors.lastname: Cifuentes
authors.forename: J C
authors.initials: JC
authors.lastname: Díez-Masa
mesh_terms: D000818:Animals; D002021:Buffers; D002417:Cattle; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D007782:Lactoglobulins / Q000737:chemistry*; D009994:Osmolar Concentration; D013056:Spectrophotometry, Ultraviolet; D013499:Surface Properties; D013696:Temperature
chemical_list: D002021:Buffers; D007782:Lactoglobulins