The genome of the influenza A virus consists of eight separate complexes of RNA and proteins, termed viral ribonucleoprotein complexes (vRNPs). This paper describes the glycerol gradient purification and transmission electron microscopy visualization of influenza A vRNPs.
Wu, W. W., Weaver, L. L., Panté, N. Purification and Visualization of Influenza A Viral Ribonucleoprotein Complexes. J. Vis. Exp. (24), e1105, doi:10.3791/1105 (2009).