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Variation of amino acid sequences at the NS1 C termini of different influenza A viruses
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a Consensus sequence for NoLS (25). The NoLS sequence is highlighted in dark gray and light gray at positions 219, 220, 224, 229, 231, and 232 of the NS1 protein. The nonbasic amino acid at position 229 (highlighted in light gray) inhibits the nucleolar localization of NS1.
b *, Data from Melen et al. (25).
