title: Use of FTIR and mass spectrometry for characterization of glycated caseins.
abstract: This study investigates the potential of Fourier transform infrared spectroscopy (FTIR) to monitor glycation-induced changes in protein structure. Aqueous solutions of sodium caseinate and glucose (1:2 w/w, pH 6.7) were heated at 90 degrees C for 0, 10, 20, 40 and 60 min. Evidence for caseinate glycation was obtained by mass spectrometry techniques (electrospray (ESI) and matrix-assisted laser desorption ionisation (MALDI)). FTIR was able to discriminate between glycated and non-glycated sodium caseinate, when the data were analysed by multivariate statistical methods; principal component analysis (PCA) and soft independent modelling of class analogy (SIMCA). The techniques used were complementary and provided different levels of information about the glycated samples.
authors.affiliation: School of Chemistry, Monash University, Clayton, VIC 3800, Australia. Christine1.Olivier@csiro.au
authors.forename: Christine M
authors.initials: CM
authors.lastname: Oliver
authors.forename: Ashwini
authors.initials: A
authors.lastname: Kher
authors.forename: Don
authors.initials: D
authors.lastname: McNaughton
authors.forename: Mary Ann
authors.initials: MA
authors.lastname: Augustin
mesh_terms: D002364:Caseins / Q000737:chemistry*; D005524:Food Technology; D013058:Mass Spectrometry / Q000379:methods*; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods*
chemical_list: D002364:Caseins