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Figure 1.
Figure 1. DNA fragment used in the cocrystal. The overall
fragment is a 19 base-pair duplex with 5′ single
“sticky-ended” overhangs. The central 17 base-pairs
correspond to a consensus operator. The dot indicates the
pseudo-dyad axis of the operator. Regions in which the sequence
palindrome is strictly upheld are shaded. The circles indicate
the locations and the nomenclature used to identify the
phosphate groups that are directly contacted by Cro.
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