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Electron density maps and flexibility of loop 1. (A) Wall-eyed stereo view of the electron density maps surrounding one of the binding regions between scFv PL-2 and Spike2. Electron density map (black) is contoured at 1.8 σ. (B) Structural comparison of all four chains of Spike2 in the asymmetric unit of the Spike2 crystal. Loop 1 is labeled. (C) Structural comparison of all eight chains of Spike2 in the asymmetric unit of the scFv PL-2/Spike2 complex crystal. Loop 1 is labeled.
