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ECD mass spectra of intact protein assemblies: (a) concanavalin A (ConA) from Canavalia ensiformis (Jack bean); (b) FMO antenna protein from green sulfur bacterium Chlorobaculum tepidum; (c) yeast alcohol dehydrogenase (ADH) from Saccharomyces cerevisiae. The insets are native ESI spectra of each protein complex.
