Data collection and refinement statistics of native StDCyD.

aValues in parentheses refer to the highest resolution shell.bRmerge = (ΣhklΣi|Ii(hkl)−|)/ΣhklΣIi(hkl), where Ii(hkl) is the intensity of the ith measurement of reflection (hkl) and is its mean intensity.cRpim = (Σhkl[1/N-1]1/2Σi|Ii(hkl) − |)/ΣhklΣIi(hkl), where Ii(hkl) is the intensity of the ith measurement of reflection (hkl), is its mean intensity and N is the number of measurements (redundancy).dI is the integrated intensity and σ(I) is the estimated standard deviation of that intensity.eRwork = (Σhkl|Fo−Fc|)/ΣhklFo where Fo and Fc are the observed and calculated structure factors.fRfree is calculated as for Rwork but from a randomly selected subset of the data (5%), which were excluded from the refinement process.