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Changes in absorbance at 100 K occurring upon irradiation of a cubic insulin crystal, soaked (c and d) and not soaked (a and b) in 0.375 M lithium nitrate. (a and c) Absorption spectra at a dose of 0 MGy (blue) and 2.73 MGy (purple). (b and d) Changes in normalized absorbance with time at certain wavelengths of interest. 1 s of X-ray exposure is equivalent to a dose of 0.18 MGy.
