Crystallographic data.

a Numbers in parenthesis are for the highest resolution shell.merge = ∑hkl(∑i(|I hkl,i−hkl >|))/∑hkl,i hkl>, where I hkl,i is the intensity of an individual measurement of the reflection with Miller indices h, k and l, and hkl> is the mean intensity of that reflection.b Rcryst = ∑hkl(||Fobshkl|−|Fcalchkl||)/|Fobshkl|, where |Fobshkl| and |Fcalchkl| are the observed and calculated structure factor amplitudes. Rfree is equivalent to Rcryst but calculated with reflections (5%) omitted from the refinement process.c Rd Calculated with the program PROCHECKα structurese Asn239 is Ramachandran outlier in all IMP