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Native PAGE analysis of UvrABC incision of 7. A. Strand containing modified thymidine labeled at its 3′-terminus (3′-32P-“X” strand); B. Strand containing cross-linked dA labeled at its 3′-terminus (3′-32P-“Y” strand). Compound 5 is used as a single stranded 50 nt marker. 3′-32P-11 (A) and 3′-32P-12 (B) are used as double strand cleavage markers. C. Sequences of 11 and 12.
