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Amino acid sequences of the neuraminidase (NA) stalk mutants from residues 36 to 80 of WSN NA. The B cell epitope sequences derived from HBV surface (rIV-BVS) and PreS2 (rIV-BVPreS2) protein are italicized. NAmut is the partial amino acid sequences of mutant NA on the intermediate cloning vector, pT3WSN-NAmut, for introducing foreign epitopes.
