Extended Data Fig. 2: The unique wing region is only present in St1Cas9 among the currently determined Cas9 structures.
From: Catalytic-state structure and engineering of Streptococcus thermophilus Cas9
a, The REC lobe of St1Cas9 in this study. The wing region is highlighted by the pink cycle. b–g, The REC lobes of SpCas9 (b), FnCas9 (c), SaCas9 (d), Nm1Cas9 (e), CdCas9 (f) and CjCas9 (g), respectively.
