This pathogen, whose different strains are all members of Orthomyxoviridae, binds to sialic acid-rich sites.
The recently-discovered F16 antibody binds to all 16 subtypes of a protein expressed by this pathogen. During infection, this pathogen's matrix protein M1 dissociates from the ribonucleoprotein after M2 proton channel activity lowers the pH. Another protein expressed by this pathogen is cleaved by proteases into two forms, one of which extends a triple alpha helix to the endosomal membrane. This pathogen, whose different strains are all members of Orthomyxoviridae, binds to sialic acid-rich sites. Different subtypes of its surface proteins (*) hemagglutinin and neuraminidase are used for classification. Cold temperatures contribute to its spread during its namesake "season" in winter. For 10 points, name this virus whose H1N1 "swine" strain emerged in 2009.
The recently-discovered F16 antibody binds to all 16 subtypes of a protein expressed by this pathogen.
influenza virus [accept Orthomyxoviridae before mention]