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Results for HTH target 3RKQ with ideal fragments: (a) HTH fragment (31 residues); (b) three-helix bundle fragment (49 residues); (c) HTH fragment plus DNA (31 residues + 10 bp); (d) three-helix bundle HTH fragment plus DNA (49 residues + 10 bp). With the ideal fragments the target structure 3rkq can easily be solved, as indicated by SHELXE CCs of greater than 30% (green bars) and Phaser TFZ scores of greater than 20 (blue lines).
