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Asprellcosides B directly interacts with hemagglutinin. (A) The binding curve of Asprellcosides B with HA protein in SPR assay. (B,C) The 3D drawing of the estimated domain of the HA2 protein bound to Asprellcosides B. (D) The 2D drawing of the calculated domain of the insertion of Asprellcosides B in the HA2 protein-binding site.
