References
1. Protein Data Bank. http://www.pdb.org/pdb/home/home.do
2. Wang et al. Influenza A Virus N5 Neuraminidase Has an Extended 150-Cavity. Journal of Virology. 8431–8435 (2011). doi: 10.1128/JVI.00638-11
3. Russell et. al. The structure of H5N1 avian influenza neuraminidase suggests new opportunities for drug design. Nature. 443(7), 45-49 (2006). doi:10.1038/nature05114
4. Li et al. The 2009 pandemic H1N1 neuraminidase N1 lacks the 150-cavity in its active site. Nature Structural and Molecular Biology. 17(10), 1266-1268 (2010). doi:10.1038/nsmb.1909
5. Stephen F. Altschul, Thomas L. Madden, Alejandro A. Schäffer, Jinghui Zhang, Zheng Zhang, Webb Miller, and David J. Lipman (1997), "Gapped BLAST and PSI-BLAST: a new generation of protein database search programs", Nucleic Acids Res. 25:3389-3402.