They provide amino acid sequences and / or may be particularly relevant to the viral F protein.Specific compounds or proteins and basic compositions of pi_lambda_pi_pi_pi_delta_alpha have been constructed, including one or more such bases. Amino acids.Amino acid sequence, therapeutic compound and composition of pi_lambda_pi_pi_delta_alpha, the present invention has improved stability;Less immunogenicity and / or improved affinity and / or more committed to the F protein virus.The present invention relates to a kind of application, and also for the purpose of prevention and/or treatment of such amino acid sequence, pi_lambda_pi____delta_compound or kappa_____compound or kappa__ Set up.
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