FIG. 4.
(A) HincII digest of plasmid types A, B, and C. Lanes; 1, 1-kb ladder (BRL, Bethesda, Md.); 2, C6/pNF34 (type A); 3, C6/pNF1358 (type B); 4, DH/pNF4656. (B) Subsequent Southern hybridization of gel in panel A probed with whole pNF4656 DNA.
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