TABLE 1.

Data collection and refinement statistics for DNA free structures

Values in parentheses are for the highest resolution shell.

⁺R_merge = Σ_hklΣ_i|I_i − I_m|/Σ_hklΣ_iI_i, where I_i and I_m are the observed intensity and mean intensity of related reflections, respectively.

*R_p.i.m. = Σ_hkl√(1/n − 1) Σ_{in = 1}|I_i − I_m|/Σ_hklΣ_i I_i.