Inward- and outward-facing X-ray crystal structures of homodimeric P-glycoprotein CmABCB1

P-glycoprotein, an ATP-binding cassette (ABC) transporter, extrudes a large variety of xenobiotics from the cell which protects tissues from toxins. Here authors solve a pair of X-ray structures of homodimeric P-glycoprotein and resolve structural elements proposed to participate in the mechanism of the transporter.