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SWISS-model for porin permeability to imipenem and plasmid harboring blaOXA–23 in IRAB isolates. (A) 3D model for CarO of ATCC 19606 with 14 β-sheets, which form a large porin channel for imipenem to pass through; (B) 3D model for CarO of IRAB with 8 β-sheets, which block the porin channel to hinder the passage of imipenem; the sequence identity with the template 4fuv.1.A was 100%; (C) plasmid harboring blaOXA–23 in IRAB isolates.
