3KHW:
reference: Biological and structural characterization of a host-adapting amino acid in influenza virus., Yamada S, Hatta M, Staker BL, Watanabe S, Imai M, Shinya K, Sakai-Tagawa Y, Ito M, Ozawa M, Watanabe T, Sakabe S, Li C, Kim JH, Myler PJ, Phan I, Raymond A, Smith E, Stacy R, Nidom CA, Lank SM, Wiseman RW, Bimber BN, O'Connor DH, Neumann G, Stewart LJ, Kawaoka Y, PLoS Pathog. 2010 Aug 5;6(8). pii: e1001034. PMID: 20700447

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