Peptides derived from influenza type A viruses and their antiviral activities.

a All C-termini were amidated, and the molecular weight calculation was based on: http://www.peptidesynthetics.co.uk/tools/bA/Puerto Rico/8/34(H1N1). Antiviral effects were determined by viral cytopathic effect (CPE) inhibition assay and Ribavirin was used as a positive control (IC50: 3.22±0.76 μg/mL).cA/Aichi/2/68 (H3N2). Antiviral results were obtained by CPE inhibition assay and Ribavirin as a positive control (IC50: 0.63±0.018 μg/mL).d NA: not active; NT: not test.Peptides derived from influenza type A viruses and their antiviral activities.