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Preparation of rKAAs. a Nonreducing SDS-PAGE for purified His-rKAA-1 (lane 1) and rKAA-1 (lane 2). Five micrograms of each protein was loaded. M molecular weight marker. ESI-MS multiply charged spectra of purified His-rKAA-1 (b) and rKAA-1 (c) were shown
