The ha and na surface glycoproteins of virion interactions with the host cell. Ha mediate entry of the virus by binding to cellular receptors and facilitating its membrane fusion with the endosomal membrane (hamilton et al., 2012, tong et al., 2013,
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The nobel prize for chemistry this year is a tribute to the power of evolution. The laureates harnessed evolution and used it in the microsope with amazing results.Frances h. Arnold , an american who was given one half of the prize used directed evolution to synthesize variants of naturally occuring enzymes that colud be used article
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Both possess a host-derived lipid membrane, referred to as an envelope, which is decorated on the surface with the viral membrane proteins HA, NA,
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