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Genomic Southern blot hybridizations of polytene and diploid DNA with different probes from the BX-C. (A) Southern blots with Oregon R genomic DNA from experiment I. (B) Southern blots with Oregon R genomic DNA from experiment III. (C) Southern blots with Su(UR)ES genomic DNA. “Polytene” DNA was prepared from salivary glands (s.g.) and diploid DNA was from adult heads (a.h.). rosy or 3144 were used as an internal control.
