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Identification of the carnosine conjugates of acrolein. A, ESI+/MS spectra of carnosine-propanal conjugates generated by incubating acrolein with carnosine as described under “Experimental Procedures.” Putative structures of the conjugates identified by mass spectrometry are shown in the figure for each m/z value. The fragmentation patterns of the major ions with m/z values of 283 (B), 321(C), and 339 (D) are shown.
