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Secondary structure by FTIR of the solid cakes of the three proteins subjected to conservative (T s = −25°C, solid line in each panel) and aggressive drying (T s = +25°C, dashed line in each panel). a, b Lysozyme 5 and 20 mg/mL, respectively. c, d BSA 5 and 20 mg/mL, respectively. e, f IgG 5 and 20 mg/mL, respectively
