Statistics on data processing and structure determination of ΔC6 Sto-RNase HI.

Values in parentheses are the highest-resolution bin of respective data.aRmerge = Σ |Ihkl - hkl>|/Σ Ihkl, where Ihkl is the intensity measurement for reflection with indices hkl and hkl> is the mean intensity for multiply recorded reflections.bRwork, free = Σ ||Fobs| - |Fcalc||/Σ |Fobs|, where the R-factors are calculated using the working and free reflection sets, respectively. The free reflections comprise a random 10% of the data held aside for unbiased cross-validation throughout refinement.