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ijfs12035-sup-0001-FigureS1-S5.docWord document4682K

Figure S1. SDS-PAGE profiles of aqueous extract of quinoa protein (PE) treated at pH 8–12. No reducing conditions (left lanes);M is the protein standard; and with 2-ME (right lanes). Gl, indicate the band of globuline. AS corresponds to acidic subunit, and BS to basic subunit.

Figure S2. Size-exclusion chromatography coupled with evaporative light scattering of aqueous extract of quinoa protein (PE) treated between pH 8 to 12. A1, A2 correspond to protein aggregates, and F1, F2 and F3 indicate the protein fractions.

Figure S3. Fluorescence emission spectrum of aqueous extracts of quinoa protein (PE) treated at pH 8–12.

Figure S4. Fourier transform infrared spectroscopy spectra of quinoa protein film at pH 12.

Figure S5 Scanning electron micrographs (SEM) of surface quinoa protein film at pH 12. (a) 5009 (b) 20009 (c) 50009 and (d) 80009.

ijfs12035-sup-0002-TableS1.docWord document41KTable S1. Free (SHf), exposed (SHe), total (SHt) sulphydryl groups and disulphide bonds (SS) of aqueous extract of quinoa protein (PE) treated between pH 8–12.

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