Synthetic antibodies against BRIL as universal fiducial marks for single−particle cryoEM structure determination of membrane proteins

Single particle cryo-electron microscopy of membrane proteins is limited by their small size and difficulty to orient. Here the authors generate recombinant antibodies against the 12 kDa fusion partner BRIL domain from apocytochrome b562 to use them as plug and play fiducial marks for structure determination of BRIL fused membrane proteins.