Related Experiment Video
Updated: Jul 20, 2026

Avian Influenza Surveillance with FTA Cards: Field Methods, Biosafety, and Transportation Issues Solved
Published on: August 2, 2011
Comment on "Large-scale sequence analysis of avian influenza isolates"
Edward C Holmes1, David J Lipman, Dmitriy Zamarin
1Center for Infectious Disease Dynamics, Department of Biology, Pennsylvania State University, Mueller Laboratory, University Park, PA 16802, USA.
The influenza A virus PB1-F2 gene
Area of Science:
- Virology
- Molecular Biology
- Evolutionary Biology
Background:
- The PB1-F2 gene of influenza A virus was previously reported to be under strong positive selection.
- This conclusion was based on a high ratio of nonsynonymous to synonymous nucleotide substitutions (dN/dS).
Discussion:
- The high dN/dS ratio observed for PB1-F2 may be an artifact.
- This artifact is likely due to the gene's location within the +1 reading frame of the PB1 gene.
Key Insights:
- Re-evaluation of evolutionary selection pressures on influenza A virus genes.
- Understanding the impact of gene location and reading frame on evolutionary analyses.
- Correcting potential misinterpretations of viral evolution data.
Outlook:
- Further investigation into the evolutionary dynamics of influenza virus genes.
- Refining methods for analyzing viral gene evolution, accounting for reading frame effects.
- Improved understanding of influenza virus adaptation and pathogenicity.
More Related Videos
08:46Rapid Diagnosis of Avian Influenza Virus in Wild Birds: Use of a Portable rRT-PCR and Freeze-dried Reagents in the Field
Published on: August 2, 2011
08:10Production of High-Titer Infectious Influenza Pseudotyped Particles with Envelope Glycoproteins from Highly Pathogenic H5N1 and Avian H7N9 Viruses
Published on: January 15, 2020
Related Concept Videos
Viral Mutations
Evolutionary Relationships through Genome Comparisons
Leaky Scanning