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Intermonomer interactions between residue 205 in HA1 and residue 72 in HA2. (A) Alignment of NCD, Bris, and Mex HA1 amino acid residues 200 to 250 and HA2 amino acid residues 350 to 400 (HA2 residues 23 to 73). The residues in the 205-72 pair are marked with blue and red ovals, respectively. (B) (Left) The 205-72 pair position in the HA trimer complex based on the structure with PDB accession number 3M6S; (right) proposed residue interactions of R-H, R-K, H-H, and H-K in the 205-72 pair.
