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Southern analysis of the distribution of eight sap homologues among C. fetus strains. Each lane contains HindIII-digested genomic DNA from the 18 different C. fetus strains, hybridized with each of eight sap homologue-specific probes and amplified by one set of the PCR products from strain 23D shown in Fig. 5. The numbers in parentheses indicate the probe locations within the specified genes.
