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A, genetic organization of the β-glucoside operon in S. pneumoniae TIGR4. SP numbers represent the order of gene loci. Values in parentheses are calculated molecular weights of encoded proteins. B, translocation and phosphorylation of cellobiose by the multicomponent β-glucoside PEP-PTS and BglA-2-catalyzed hydrolysis of cellobiose-6′P.
