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DNA fingerprinting analysis of the pbp2x, pbp2b, and pbp1a genes from S. pneumoniae strains isolated in France. Lane M, molecular size marker VI (Roche); lanes 1 to 7, isolates 72521, 73311, 73202, 18062, 9481, 60702, and R6, respectively. (a) pbp2x digested with HinfI; (b) pbp2b digested with HaeIII; (c) pbp1a digested with StyI plus DdeI
