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Protein purification and detection. (A) SDS-PAGE analysis of Alg169. Channel M, molecular weight marker (RuiBiotech, Beijing, China); Channel 1, purified Alg169 from induced cell lysate. (B) Peptide mass spectrum of Alg169 LC-MS/MS detection. The abscissa is the mass-to-charge ratio (m/z), and the ordinate is the signal intensity. The b and y ions are shown on the top. The green is b ion and the orange is y ion.
