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Structure of the MRSA PK tetramer showing the domain boundaries and tetramer architecture. Domains were the A domain (yellow), B domain (blue), C domain (red), and extra-C-terminal domain (CT) (green). Each monomer has been colored to facilitate the identification of subunits in the tetramer. The large (A—A) and small (C—C) interfaces between monomers are shown as dashed lines.
