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LC-MS chromatograms of the tryptic peptides of αA 55–65 (TVLDSGISEVR) (a) and αA 146–157 (IQTGLDATHAER) (b) from the WI (a-1 and b-1) and WS fractions (a-2 and b-2) of 64-old-donor. a-3 and b-3 are LC-MS chromatograms of the synthetic peptides of αA 55–65 and αA 146–157, respectively.
