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The C-terminus of SisPINA folds into a KH domain. (A) The structure of SisPINA-R206A/R147K/I199S. The C-terminal domain (dashed circle) was enlarged and the α-helices and β-strands are indicated. (B) Alignment of SisPINA C-terminal KH domain with NusA. The ribbon structure of the C-terminus of SisPINA (residues 434–505) (red) is superimposed on the structure of the NusA (yellow) from Aeropyrum pernix (PDB ID: 2CXC).
